Quizbank/Electricity and Magnetism (calculus based)/QBCh16

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QB153086031104

QB:Ch 16:V1[edit | edit source]

QB153086031104

1)
A parallel plate capacitor with a capicatnce C=3.80E-06 F whose plates have an area A=3.00E+03 m2 and separation d=7.10E-03 m is connected via a swith to a 78 Ω resistor and a battery of voltage V0=25 V as shown in the figure. The current starts to flow at time t=0 when the switch is closed. What is the magnitude of the displacement current at time t=1.30E-03?
a) 2.998E-03 A
b) 3.298E-03 A
c) 3.628E-03 A
d) 3.991E-03 A
e) 4.390E-03 A
2)
A parallel plate capacitor with a capicatnce C=8.20E-06 F whose plates have an area A=6.20E+03 m2 and separation d=6.70E-03 m is connected via a swith to a 75 Ω resistor and a battery of voltage V0=17 V as shown in the figure. The current starts to flow at time t=0 when the switch is closed. What is the magnitude of the electric field at time t=6.50E-04?
a) 1.505E+03 V/m
b) 1.656E+03 V/m
c) 1.821E+03 V/m
d) 2.003E+03 V/m
e) 2.204E+03 V/m

3) A 58 kW radio transmitter on Earth sends it signal to a satellite 120 km away. At what distance in the same direction would the signal have the same maximum field strength if the transmitter's output power were increased to 88 kW?

a) 1.111E+02 km
b) 1.222E+02 km
c) 1.344E+02 km
d) 1.478E+02 km
e) 1.626E+02 km