# Physics equations/24-Electromagnetic Waves/Q:displacementCurrent

## c24ElectromagneticWaves_displacementCurrent_v1

A circlular capactitor of radius 4.2 m has a gap of 8 mm, and a charge of 45 μC. What is the electric field between the plates?

 a) 5.16E+04 N/C (or V/m) b) 6.25E+04 N/C (or V/m) c) 7.57E+04 N/C (or V/m) d) 9.17E+04 N/C (or V/m) e) 1.11E+05 N/C (or V/m)

copies
===2===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.3 m has a gap of 16 mm, and a charge of 68 μC.  What is the electric field between the plates?}
-a) 1.26E+05  N/C (or V/m)
-b) 1.53E+05  N/C (or V/m)
-c) 1.85E+05  N/C (or V/m)
+d) 2.24E+05  N/C (or V/m)
-e) 2.72E+05  N/C (or V/m)
===3===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  4.9 m has a gap of 11 mm, and a charge of 85 μC.  What is the electric field between the plates?}
+a) 1.27E+05  N/C (or V/m)
-b) 1.54E+05  N/C (or V/m)
-c) 1.87E+05  N/C (or V/m)
-d) 2.26E+05  N/C (or V/m)
-e) 2.74E+05  N/C (or V/m)
===4===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  4.4 m has a gap of 18 mm, and a charge of 36 μC.  What is the electric field between the plates?}
-a) 4.55E+04  N/C (or V/m)
-b) 5.52E+04  N/C (or V/m)
+c) 6.68E+04  N/C (or V/m)
-d) 8.10E+04  N/C (or V/m)
-e) 9.81E+04  N/C (or V/m)
===5===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.4 m has a gap of 15 mm, and a charge of 63 μC.  What is the electric field between the plates?}
-a) 1.62E+05  N/C (or V/m)
+b) 1.96E+05  N/C (or V/m)
-c) 2.37E+05  N/C (or V/m)
-d) 2.88E+05  N/C (or V/m)
-e) 3.48E+05  N/C (or V/m)
===6===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.7 m has a gap of 8 mm, and a charge of 89 μC.  What is the electric field between the plates?}
-a) 1.93E+05  N/C (or V/m)
+b) 2.34E+05  N/C (or V/m)
-c) 2.83E+05  N/C (or V/m)
-d) 3.43E+05  N/C (or V/m)
-e) 4.16E+05  N/C (or V/m)
===7===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  4.4 m has a gap of 18 mm, and a charge of 62 μC.  What is the electric field between the plates?}
-a) 9.50E+04  N/C (or V/m)
+b) 1.15E+05  N/C (or V/m)
-c) 1.39E+05  N/C (or V/m)
-d) 1.69E+05  N/C (or V/m)
-e) 2.05E+05  N/C (or V/m)
===8===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.6 m has a gap of 8 mm, and a charge of 53 μC.  What is the electric field between the plates?}
-a) 6.82E+04  N/C (or V/m)
-b) 8.27E+04  N/C (or V/m)
-c) 1.00E+05  N/C (or V/m)
-d) 1.21E+05  N/C (or V/m)
+e) 1.47E+05  N/C (or V/m)
===9===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  4.8 m has a gap of 14 mm, and a charge of 75 μC.  What is the electric field between the plates?}
-a) 5.43E+04  N/C (or V/m)
-b) 6.58E+04  N/C (or V/m)
-c) 7.97E+04  N/C (or V/m)
-d) 9.66E+04  N/C (or V/m)
+e) 1.17E+05  N/C (or V/m)
===10===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  4.3 m has a gap of 7 mm, and a charge of 47 μC.  What is the electric field between the plates?}
-a) 7.54E+04  N/C (or V/m)
+b) 9.14E+04  N/C (or V/m)
-c) 1.11E+05  N/C (or V/m)
-d) 1.34E+05  N/C (or V/m)
-e) 1.63E+05  N/C (or V/m)
===11===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  4.1 m has a gap of 14 mm, and a charge of 24 μC.  What is the electric field between the plates?}
-a) 4.24E+04  N/C (or V/m)
+b) 5.13E+04  N/C (or V/m)
-c) 6.22E+04  N/C (or V/m)
-d) 7.53E+04  N/C (or V/m)
-e) 9.13E+04  N/C (or V/m)
===12===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  4.6 m has a gap of 12 mm, and a charge of 55 μC.  What is the electric field between the plates?}
-a) 6.37E+04  N/C (or V/m)
-b) 7.71E+04  N/C (or V/m)
+c) 9.34E+04  N/C (or V/m)
-d) 1.13E+05  N/C (or V/m)
-e) 1.37E+05  N/C (or V/m)
===13===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.7 m has a gap of 10 mm, and a charge of 41 μC.  What is the electric field between the plates?}
+a) 1.08E+05  N/C (or V/m)
-b) 1.30E+05  N/C (or V/m)
-c) 1.58E+05  N/C (or V/m)
-d) 1.91E+05  N/C (or V/m)
-e) 2.32E+05  N/C (or V/m)
===14===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.7 m has a gap of 10 mm, and a charge of 12 μC.  What is the electric field between the plates?}
-a) 2.15E+04  N/C (or V/m)
-b) 2.60E+04  N/C (or V/m)
+c) 3.15E+04  N/C (or V/m)
-d) 3.82E+04  N/C (or V/m)
-e) 4.63E+04  N/C (or V/m)
===15===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.2 m has a gap of 12 mm, and a charge of 84 μC.  What is the electric field between the plates?}
-a) 1.37E+05  N/C (or V/m)
-b) 1.66E+05  N/C (or V/m)
-c) 2.01E+05  N/C (or V/m)
-d) 2.43E+05  N/C (or V/m)
+e) 2.95E+05  N/C (or V/m)
===16===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.9 m has a gap of 19 mm, and a charge of 66 μC.  What is the electric field between the plates?}
-a) 1.29E+05  N/C (or V/m)
+b) 1.56E+05  N/C (or V/m)
-c) 1.89E+05  N/C (or V/m)
-d) 2.29E+05  N/C (or V/m)
-e) 2.77E+05  N/C (or V/m)
===17===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  4.4 m has a gap of 12 mm, and a charge of 72 μC.  What is the electric field between the plates?}
-a) 6.21E+04  N/C (or V/m)
-b) 7.52E+04  N/C (or V/m)
-c) 9.11E+04  N/C (or V/m)
-d) 1.10E+05  N/C (or V/m)
+e) 1.34E+05  N/C (or V/m)
===18===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.5 m has a gap of 14 mm, and a charge of 21 μC.  What is the electric field between the plates?}
+a) 6.16E+04  N/C (or V/m)
-b) 7.47E+04  N/C (or V/m)
-c) 9.05E+04  N/C (or V/m)
-d) 1.10E+05  N/C (or V/m)
-e) 1.33E+05  N/C (or V/m)
===19===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.3 m has a gap of 14 mm, and a charge of 11 μC.  What is the electric field between the plates?}
-a) 2.04E+04  N/C (or V/m)
-b) 2.47E+04  N/C (or V/m)
-c) 3.00E+04  N/C (or V/m)
+d) 3.63E+04  N/C (or V/m)
-e) 4.40E+04  N/C (or V/m)
===20===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  4.2 m has a gap of 12 mm, and a charge of 94 μC.  What is the electric field between the plates?}
+a) 1.92E+05  N/C (or V/m)
-b) 2.32E+05  N/C (or V/m)
-c) 2.81E+05  N/C (or V/m)
-d) 3.41E+05  N/C (or V/m)
-e) 4.13E+05  N/C (or V/m)
===21===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  4.6 m has a gap of 12 mm, and a charge of 45 μC.  What is the electric field between the plates?}
-a) 6.31E+04  N/C (or V/m)
+b) 7.65E+04  N/C (or V/m)
-c) 9.26E+04  N/C (or V/m)
-d) 1.12E+05  N/C (or V/m)
-e) 1.36E+05  N/C (or V/m)
===22===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.1 m has a gap of 9 mm, and a charge of 11 μC.  What is the electric field between the plates?}
-a) 2.80E+04  N/C (or V/m)
-b) 3.40E+04  N/C (or V/m)
+c) 4.12E+04  N/C (or V/m)
-d) 4.99E+04  N/C (or V/m)
-e) 6.04E+04  N/C (or V/m)
===23===
{<!--c24ElectromagneticWaves_displacementCurrent_1-->A circlular capactitor of radius  3.4 m has a gap of 7 mm, and a charge of 95 μC.  What is the electric field between the plates?}
-a) 2.44E+05  N/C (or V/m)
+b) 2.95E+05  N/C (or V/m)
-c) 3.58E+05  N/C (or V/m)
-d) 4.34E+05  N/C (or V/m)
-e) 5.25E+05  N/C (or V/m)

## c24ElectromagneticWaves_displacementCurrent_v1

A circlular capactitor of radius 3.2 m has a gap of 13 mm, and a charge of 49 μC. Compute the surface integral ${\displaystyle c^{-2}\oint {\vec {E}}\cdot d{\vec {A}}}$ over an inner face of the capacitor.

 a) 3.46E-11 Vs2m-1 b) 4.20E-11 Vs2m-1 c) 5.08E-11 Vs2m-1 d) 6.16E-11 Vs2m-1 e) 7.46E-11 Vs2m-1

copies
===2===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.6 m has a gap of 12 mm, and a charge of 77 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 6.59E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 7.99E-11  Vs<sup>2</sup>m<sup>-1</sup>
+c) 9.68E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 1.17E-10  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.42E-10  Vs<sup>2</sup>m<sup>-1</sup>
===3===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.5 m has a gap of 19 mm, and a charge of 13 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 1.35E-11  Vs<sup>2</sup>m<sup>-1</sup>
+b) 1.63E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 1.98E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 2.40E-11  Vs<sup>2</sup>m<sup>-1</sup>
-e) 2.91E-11  Vs<sup>2</sup>m<sup>-1</sup>
===4===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.4 m has a gap of 8 mm, and a charge of 85 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 4.96E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 6.01E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 7.28E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 8.82E-11  Vs<sup>2</sup>m<sup>-1</sup>
+e) 1.07E-10  Vs<sup>2</sup>m<sup>-1</sup>
===5===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.3 m has a gap of 11 mm, and a charge of 66 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 6.85E-11  Vs<sup>2</sup>m<sup>-1</sup>
+b) 8.29E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 1.00E-10  Vs<sup>2</sup>m<sup>-1</sup>
-d) 1.22E-10  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.47E-10  Vs<sup>2</sup>m<sup>-1</sup>
===6===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  3.2 m has a gap of 19 mm, and a charge of 46 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
+a) 5.78E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 7.00E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 8.48E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 1.03E-10  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.25E-10  Vs<sup>2</sup>m<sup>-1</sup>
===7===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  3.2 m has a gap of 18 mm, and a charge of 82 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 5.79E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 7.02E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 8.51E-11  Vs<sup>2</sup>m<sup>-1</sup>
+d) 1.03E-10  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.25E-10  Vs<sup>2</sup>m<sup>-1</sup>
===8===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  3.7 m has a gap of 17 mm, and a charge of 80 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 4.67E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 5.65E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 6.85E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 8.30E-11  Vs<sup>2</sup>m<sup>-1</sup>
+e) 1.01E-10  Vs<sup>2</sup>m<sup>-1</sup>
===9===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.1 m has a gap of 7 mm, and a charge of 50 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 2.92E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 3.53E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 4.28E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 5.19E-11  Vs<sup>2</sup>m<sup>-1</sup>
+e) 6.28E-11  Vs<sup>2</sup>m<sup>-1</sup>
===10===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.3 m has a gap of 19 mm, and a charge of 83 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 5.87E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 7.11E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 8.61E-11  Vs<sup>2</sup>m<sup>-1</sup>
+d) 1.04E-10  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.26E-10  Vs<sup>2</sup>m<sup>-1</sup>
===11===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.8 m has a gap of 12 mm, and a charge of 29 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 2.05E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 2.48E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 3.01E-11  Vs<sup>2</sup>m<sup>-1</sup>
+d) 3.64E-11  Vs<sup>2</sup>m<sup>-1</sup>
-e) 4.42E-11  Vs<sup>2</sup>m<sup>-1</sup>
===12===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.4 m has a gap of 17 mm, and a charge of 65 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 5.56E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 6.74E-11  Vs<sup>2</sup>m<sup>-1</sup>
+c) 8.17E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 9.90E-11  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.20E-10  Vs<sup>2</sup>m<sup>-1</sup>
===13===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  3.8 m has a gap of 14 mm, and a charge of 61 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
+a) 7.67E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 9.29E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 1.13E-10  Vs<sup>2</sup>m<sup>-1</sup>
-d) 1.36E-10  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.65E-10  Vs<sup>2</sup>m<sup>-1</sup>
===14===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.1 m has a gap of 8 mm, and a charge of 24 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 2.05E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 2.49E-11  Vs<sup>2</sup>m<sup>-1</sup>
+c) 3.02E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 3.65E-11  Vs<sup>2</sup>m<sup>-1</sup>
-e) 4.43E-11  Vs<sup>2</sup>m<sup>-1</sup>
===15===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  3.8 m has a gap of 14 mm, and a charge of 83 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 7.11E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 8.61E-11  Vs<sup>2</sup>m<sup>-1</sup>
+c) 1.04E-10  Vs<sup>2</sup>m<sup>-1</sup>
-d) 1.26E-10  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.53E-10  Vs<sup>2</sup>m<sup>-1</sup>
===16===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.4 m has a gap of 16 mm, and a charge of 41 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 3.51E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 4.25E-11  Vs<sup>2</sup>m<sup>-1</sup>
+c) 5.15E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 6.24E-11  Vs<sup>2</sup>m<sup>-1</sup>
-e) 7.56E-11  Vs<sup>2</sup>m<sup>-1</sup>
===17===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.8 m has a gap of 17 mm, and a charge of 73 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
+a) 9.17E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 1.11E-10  Vs<sup>2</sup>m<sup>-1</sup>
-c) 1.35E-10  Vs<sup>2</sup>m<sup>-1</sup>
-d) 1.63E-10  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.98E-10  Vs<sup>2</sup>m<sup>-1</sup>
===18===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.3 m has a gap of 14 mm, and a charge of 15 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 8.75E-12  Vs<sup>2</sup>m<sup>-1</sup>
-b) 1.06E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 1.28E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 1.56E-11  Vs<sup>2</sup>m<sup>-1</sup>
+e) 1.88E-11  Vs<sup>2</sup>m<sup>-1</sup>
===19===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.5 m has a gap of 18 mm, and a charge of 92 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 7.88E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 9.54E-11  Vs<sup>2</sup>m<sup>-1</sup>
+c) 1.16E-10  Vs<sup>2</sup>m<sup>-1</sup>
-d) 1.40E-10  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.70E-10  Vs<sup>2</sup>m<sup>-1</sup>
===20===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  4.3 m has a gap of 12 mm, and a charge of 85 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 7.28E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 8.82E-11  Vs<sup>2</sup>m<sup>-1</sup>
+c) 1.07E-10  Vs<sup>2</sup>m<sup>-1</sup>
-d) 1.29E-10  Vs<sup>2</sup>m<sup>-1</sup>
-e) 1.57E-10  Vs<sup>2</sup>m<sup>-1</sup>
===21===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  3.7 m has a gap of 8 mm, and a charge of 34 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 2.40E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 2.91E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 3.53E-11  Vs<sup>2</sup>m<sup>-1</sup>
+d) 4.27E-11  Vs<sup>2</sup>m<sup>-1</sup>
-e) 5.18E-11  Vs<sup>2</sup>m<sup>-1</sup>
===22===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  3.4 m has a gap of 8 mm, and a charge of 34 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 3.53E-11  Vs<sup>2</sup>m<sup>-1</sup>
+b) 4.27E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 5.18E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 6.27E-11  Vs<sup>2</sup>m<sup>-1</sup>
-e) 7.60E-11  Vs<sup>2</sup>m<sup>-1</sup>
===23===
{<!--c24ElectromagneticWaves_displacementCurrent_2-->A circlular capactitor of radius  3.9 m has a gap of 19 mm, and a charge of 78 μC.  Compute the surface integral  $c^{-2}\oint\vec E\cdot d\vec A$ over an inner face of the capacitor.}
-a) 4.55E-11  Vs<sup>2</sup>m<sup>-1</sup>
-b) 5.51E-11  Vs<sup>2</sup>m<sup>-1</sup>
-c) 6.68E-11  Vs<sup>2</sup>m<sup>-1</sup>
-d) 8.09E-11  Vs<sup>2</sup>m<sup>-1</sup>
+e) 9.80E-11  Vs<sup>2</sup>m<sup>-1</sup>

## c24ElectromagneticWaves_displacementCurrent_v1

A circlular capactitor of radius 4.9 m has a gap of 17 mm, and a charge of 54 μC. The capacitor is discharged through a 9 kΩ resistor. What is the decay time?

 a) 2.92E-04 s b) 3.54E-04 s c) 4.28E-04 s d) 5.19E-04 s e) 6.29E-04 s

copies
===2===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4.6 m has a gap of 11 mm, and a charge of 60 μC.  The capacitor is discharged through a  9 kΩ resistor.  What is the decay time? }
-a) 3.28E-04  s
-b) 3.97E-04  s
+c) 4.82E-04  s
-d) 5.83E-04  s
-e) 7.07E-04  s
===3===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  3.7 m has a gap of 15 mm, and a charge of 36 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is the decay time? }
-a) 1.04E-04  s
-b) 1.26E-04  s
+c) 1.52E-04  s
-d) 1.85E-04  s
-e) 2.24E-04  s
===4===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  3.3 m has a gap of 14 mm, and a charge of 43 μC.  The capacitor is discharged through a  9 kΩ resistor.  What is the decay time? }
+a) 1.95E-04  s
-b) 2.36E-04  s
-c) 2.86E-04  s
-d) 3.46E-04  s
-e) 4.20E-04  s
===5===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4.6 m has a gap of 7 mm, and a charge of 18 μC.  The capacitor is discharged through a  9 kΩ resistor.  What is the decay time? }
-a) 6.25E-04  s
+b) 7.57E-04  s
-c) 9.17E-04  s
-d) 1.11E-03  s
-e) 1.35E-03  s
===6===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  3.1 m has a gap of 11 mm, and a charge of 76 μC.  The capacitor is discharged through a  8 kΩ resistor.  What is the decay time? }
+a) 1.94E-04  s
-b) 2.36E-04  s
-c) 2.85E-04  s
-d) 3.46E-04  s
-e) 4.19E-04  s
===7===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  3.6 m has a gap of 14 mm, and a charge of 98 μC.  The capacitor is discharged through a  8 kΩ resistor.  What is the decay time? }
-a) 1.40E-04  s
-b) 1.70E-04  s
+c) 2.06E-04  s
-d) 2.50E-04  s
-e) 3.02E-04  s
===8===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4.3 m has a gap of 8 mm, and a charge of 12 μC.  The capacitor is discharged through a  7 kΩ resistor.  What is the decay time? }
-a) 3.07E-04  s
-b) 3.71E-04  s
+c) 4.50E-04  s
-d) 5.45E-04  s
-e) 6.61E-04  s
===9===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4.3 m has a gap of 13 mm, and a charge of 44 μC.  The capacitor is discharged through a  9 kΩ resistor.  What is the decay time? }
-a) 2.00E-04  s
-b) 2.43E-04  s
-c) 2.94E-04  s
+d) 3.56E-04  s
-e) 4.31E-04  s
===10===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4 m has a gap of 16 mm, and a charge of 48 μC.  The capacitor is discharged through a  9 kΩ resistor.  What is the decay time? }
-a) 1.16E-04  s
-b) 1.41E-04  s
-c) 1.71E-04  s
-d) 2.07E-04  s
+e) 2.50E-04  s
===11===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4.8 m has a gap of 16 mm, and a charge of 89 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is the decay time? }
-a) 1.98E-04  s
+b) 2.40E-04  s
-c) 2.91E-04  s
-d) 3.53E-04  s
-e) 4.27E-04  s
===12===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4.1 m has a gap of 11 mm, and a charge of 51 μC.  The capacitor is discharged through a  8 kΩ resistor.  What is the decay time? }
+a) 3.40E-04  s
-b) 4.12E-04  s
-c) 4.99E-04  s
-d) 6.05E-04  s
-e) 7.33E-04  s
===13===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  3.8 m has a gap of 12 mm, and a charge of 56 μC.  The capacitor is discharged through a  8 kΩ resistor.  What is the decay time? }
+a) 2.68E-04  s
-b) 3.24E-04  s
-c) 3.93E-04  s
-d) 4.76E-04  s
-e) 5.77E-04  s
===14===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4.2 m has a gap of 18 mm, and a charge of 97 μC.  The capacitor is discharged through a  7 kΩ resistor.  What is the decay time? }
+a) 1.91E-04  s
-b) 2.31E-04  s
-c) 2.80E-04  s
-d) 3.39E-04  s
-e) 4.11E-04  s
===15===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4.7 m has a gap of 19 mm, and a charge of 27 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is the decay time? }
-a) 1.60E-04  s
+b) 1.94E-04  s
-c) 2.35E-04  s
-d) 2.85E-04  s
-e) 3.45E-04  s
===16===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4 m has a gap of 14 mm, and a charge of 24 μC.  The capacitor is discharged through a  7 kΩ resistor.  What is the decay time? }
-a) 1.84E-04  s
+b) 2.23E-04  s
-c) 2.70E-04  s
-d) 3.27E-04  s
-e) 3.96E-04  s
===17===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  3.3 m has a gap of 12 mm, and a charge of 63 μC.  The capacitor is discharged through a  7 kΩ resistor.  What is the decay time? }
-a) 9.94E-05  s
-b) 1.20E-04  s
-c) 1.46E-04  s
+d) 1.77E-04  s
-e) 2.14E-04  s
===18===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  3.2 m has a gap of 8 mm, and a charge of 12 μC.  The capacitor is discharged through a  7 kΩ resistor.  What is the decay time? }
+a) 2.49E-04  s
-b) 3.02E-04  s
-c) 3.66E-04  s
-d) 4.43E-04  s
-e) 5.37E-04  s
===19===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4.9 m has a gap of 13 mm, and a charge of 35 μC.  The capacitor is discharged through a  5 kΩ resistor.  What is the decay time? }
+a) 2.57E-04  s
-b) 3.11E-04  s
-c) 3.77E-04  s
-d) 4.57E-04  s
-e) 5.53E-04  s
===20===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  4.1 m has a gap of 14 mm, and a charge of 71 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is the decay time? }
-a) 1.65E-04  s
+b) 2.00E-04  s
-c) 2.43E-04  s
-d) 2.94E-04  s
-e) 3.56E-04  s
===21===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  3.2 m has a gap of 12 mm, and a charge of 33 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is the decay time? }
+a) 1.42E-04  s
-b) 1.73E-04  s
-c) 2.09E-04  s
-d) 2.53E-04  s
-e) 3.07E-04  s
===22===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  3.4 m has a gap of 8 mm, and a charge of 64 μC.  The capacitor is discharged through a  9 kΩ resistor.  What is the decay time? }
+a) 3.62E-04  s
-b) 4.38E-04  s
-c) 5.31E-04  s
-d) 6.43E-04  s
-e) 7.79E-04  s
===23===
{<!--c24ElectromagneticWaves_displacementCurrent_3-->A circlular capactitor of radius  3.1 m has a gap of 15 mm, and a charge of 73 μC.  The capacitor is discharged through a  8 kΩ resistor.  What is the decay time? }
-a) 6.62E-05  s
-b) 8.02E-05  s
-c) 9.71E-05  s
-d) 1.18E-04  s
+e) 1.43E-04  s

## c24ElectromagneticWaves_displacementCurrent_v1

A circlular capactitor of radius 3.3 m has a gap of 12 mm, and a charge of 93 μC. The capacitor is discharged through a 9 kΩ resistor. What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)

 a) 9.88E-09 Tesla b) 1.24E-08 Tesla c) 1.57E-08 Tesla d) 1.97E-08 Tesla e) 2.48E-08 Tesla

copies
===2===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.1 m has a gap of 11 mm, and a charge of 66 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 6.33E-09  Tesla
-b) 7.96E-09  Tesla
-c) 1.00E-08  Tesla
+d) 1.26E-08  Tesla
-e) 1.59E-08  Tesla
===3===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.4 m has a gap of 15 mm, and a charge of 63 μC.  The capacitor is discharged through a  8 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 7.92E-09  Tesla
+b) 9.97E-09  Tesla
-c) 1.26E-08  Tesla
-d) 1.58E-08  Tesla
-e) 1.99E-08  Tesla
===4===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4 m has a gap of 13 mm, and a charge of 89 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 8.62E-09  Tesla
-b) 1.09E-08  Tesla
-c) 1.37E-08  Tesla
-d) 1.72E-08  Tesla
+e) 2.17E-08  Tesla
===5===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.3 m has a gap of 10 mm, and a charge of 46 μC.  The capacitor is discharged through a  5 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
+a) 8.32E-09  Tesla
-b) 1.05E-08  Tesla
-c) 1.32E-08  Tesla
-d) 1.66E-08  Tesla
-e) 2.09E-08  Tesla
===6===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.1 m has a gap of 15 mm, and a charge of 90 μC.  The capacitor is discharged through a  5 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 1.41E-08  Tesla
-b) 1.78E-08  Tesla
-c) 2.24E-08  Tesla
+d) 2.82E-08  Tesla
-e) 3.55E-08  Tesla
===7===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.6 m has a gap of 12 mm, and a charge of 52 μC.  The capacitor is discharged through a  7 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 3.30E-09  Tesla
-b) 4.15E-09  Tesla
-c) 5.23E-09  Tesla
+d) 6.58E-09  Tesla
-e) 8.29E-09  Tesla
===8===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  3.6 m has a gap of 19 mm, and a charge of 98 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 1.90E-08  Tesla
-b) 2.40E-08  Tesla
-c) 3.02E-08  Tesla
-d) 3.80E-08  Tesla
+e) 4.78E-08  Tesla
===9===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.6 m has a gap of 18 mm, and a charge of 44 μC.  The capacitor is discharged through a  7 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 6.64E-09  Tesla
+b) 8.36E-09  Tesla
-c) 1.05E-08  Tesla
-d) 1.32E-08  Tesla
-e) 1.67E-08  Tesla
===10===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.9 m has a gap of 18 mm, and a charge of 45 μC.  The capacitor is discharged through a  7 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 2.82E-09  Tesla
-b) 3.54E-09  Tesla
-c) 4.46E-09  Tesla
-d) 5.62E-09  Tesla
+e) 7.07E-09  Tesla
===11===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.3 m has a gap of 15 mm, and a charge of 21 μC.  The capacitor is discharged through a  7 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 1.62E-09  Tesla
-b) 2.04E-09  Tesla
-c) 2.57E-09  Tesla
-d) 3.23E-09  Tesla
+e) 4.07E-09  Tesla
===12===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.7 m has a gap of 16 mm, and a charge of 12 μC.  The capacitor is discharged through a  8 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 6.62E-10  Tesla
-b) 8.33E-10  Tesla
-c) 1.05E-09  Tesla
-d) 1.32E-09  Tesla
+e) 1.66E-09  Tesla
===13===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.9 m has a gap of 16 mm, and a charge of 46 μC.  The capacitor is discharged through a  9 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
+a) 5.00E-09  Tesla
-b) 6.29E-09  Tesla
-c) 7.92E-09  Tesla
-d) 9.97E-09  Tesla
-e) 1.26E-08  Tesla
===14===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.9 m has a gap of 14 mm, and a charge of 56 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 3.18E-09  Tesla
-b) 4.00E-09  Tesla
-c) 5.04E-09  Tesla
-d) 6.34E-09  Tesla
+e) 7.99E-09  Tesla
===15===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.8 m has a gap of 14 mm, and a charge of 55 μC.  The capacitor is discharged through a  8 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 3.95E-09  Tesla
-b) 4.97E-09  Tesla
+c) 6.26E-09  Tesla
-d) 7.88E-09  Tesla
-e) 9.92E-09  Tesla
===16===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.4 m has a gap of 12 mm, and a charge of 85 μC.  The capacitor is discharged through a  8 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 5.39E-09  Tesla
-b) 6.79E-09  Tesla
-c) 8.55E-09  Tesla
+d) 1.08E-08  Tesla
-e) 1.35E-08  Tesla
===17===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  3.1 m has a gap of 9 mm, and a charge of 85 μC.  The capacitor is discharged through a  5 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 2.33E-08  Tesla
-b) 2.93E-08  Tesla
+c) 3.69E-08  Tesla
-d) 4.65E-08  Tesla
-e) 5.85E-08  Tesla
===18===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.6 m has a gap of 15 mm, and a charge of 57 μC.  The capacitor is discharged through a  9 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 4.43E-09  Tesla
-b) 5.57E-09  Tesla
+c) 7.02E-09  Tesla
-d) 8.83E-09  Tesla
-e) 1.11E-08  Tesla
===19===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4 m has a gap of 14 mm, and a charge of 78 μC.  The capacitor is discharged through a  5 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 9.77E-09  Tesla
-b) 1.23E-08  Tesla
-c) 1.55E-08  Tesla
-d) 1.95E-08  Tesla
+e) 2.45E-08  Tesla
===20===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  3.5 m has a gap of 14 mm, and a charge of 88 μC.  The capacitor is discharged through a  7 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 1.86E-08  Tesla
-b) 2.34E-08  Tesla
+c) 2.95E-08  Tesla
-d) 3.72E-08  Tesla
-e) 4.68E-08  Tesla
===21===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  3.9 m has a gap of 8 mm, and a charge of 55 μC.  The capacitor is discharged through a  8 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 5.30E-09  Tesla
+b) 6.67E-09  Tesla
-c) 8.39E-09  Tesla
-d) 1.06E-08  Tesla
-e) 1.33E-08  Tesla
===22===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.8 m has a gap of 9 mm, and a charge of 53 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 3.26E-09  Tesla
-b) 4.11E-09  Tesla
+c) 5.17E-09  Tesla
-d) 6.51E-09  Tesla
-e) 8.19E-09  Tesla
===23===
{<!--c24ElectromagneticWaves_displacementCurrent_4-->A circlular capactitor of radius  4.1 m has a gap of 9 mm, and a charge of 79 μC.  The capacitor is discharged through a  6 kΩ resistor.  What is what is the maximum magnetic field at the edge of the capacitor? (There are two ways to do this; you should know both.)}
-a) 7.80E-09  Tesla
-b) 9.82E-09  Tesla
+c) 1.24E-08  Tesla
-d) 1.56E-08  Tesla
-e) 1.96E-08  Tesla