User:Guy vandegrift/Quizbank/Archive1/College Physics/II T2study

TrigPhysT2_151021_Study

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This document contains either a study guide OR pairs of exams taken from the same exam bank
If two exams have the same s-number, then v1 and v2 have the same questions, presented in different (random) order.
Exams with different s-numbers have different questions and may not have the same difficulty.
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Study guide links reading materials and/or relevant equations.

TrigPhysT2_151021_Study-v1s1

1. What is the magnitude of the electric field at the origin if a 1.7 nC charge is placed at x = 6.4 m, and a 3 nC charge is placed at y = 8 m?

___a) 4.22 x 10-1N/C
___b) 4.87 x 10-1N/C
___c) 5.63 x 10-1N/C
___d) 6.5 x 10-1N/C
___e) 7.51 x 10-1N/C

2. What angle does the electric field at the origin make with the x-axis if a 2.8 nC charge is placed at x = -8 m, and a 1.5 nC charge is placed at y = -8.7 m?

___a) 2.44 x 101degrees
___b) 2.81 x 101degrees
___c) 3.25 x 101degrees
___d) 3.75 x 101degrees
___e) 4.33 x 101degrees

3. A dipole at the origin consists of charge Q placed at x = 0.5a, and charge of -Q placed at x = -0.5a. The absolute value of the x component of the electric field at (x,y) =( 5a, 5a) is βkQ/a2, where β equals

___a) 6.46 x 10-4 unit
___b) 7.82 x 10-4 unit
___c) 9.48 x 10-4 unit
___d) 1.15 x 10-3 unit
___e) 1.39 x 10-3 unit

4. A dipole at the origin consists of charge Q placed at x = 0.5a, and charge of -Q placed at x = -0.5a. The absolute value of the y component of the electric field at (x,y) =( 1.1a, 1.2a) is βkQ/a2, where β equals

___a) 1.95 x 10-1 unit
___b) 2.36 x 10-1 unit
___c) 2.86 x 10-1 unit
___d) 3.47 x 10-1 unit
___e) 4.2 x 10-1 unit

5. How fast is a 2672 eV electron moving?

___a) 6.1 x 106 m/s.
___b) 9.1 x 106 m/s.
___c) 1.4 x 107 m/s.
___d) 2 x 107 m/s.
___e) 3.1 x 107 m/s.

6. A proton is accellerated (at rest) from a plate held at 588.2 volts to a plate at zero volts. What is the final speed?

___a) 6.6 x 104 m/s.
___b) 10 x 104 m/s.
___c) 1.5 x 105 m/s.
___d) 2.2 x 105 m/s.
___e) 3.4 x 105 m/s.

7. What voltage is required accelerate an electron at rest to a speed of 1.5 x 103 m/s?

___a) 1.9 x 10-6 volts
___b) 2.8 x 10-6 volts
___c) 4.3 x 10-6 volts
___d) 6.4 x 10-6 volts
___e) 9.6 x 10-6 volts

8. What voltage is required to stop a proton moving at a speed of 8 x 107 m/s?

___a) 3.3 x 107 volts
___b) 5 x 107 volts
___c) 7.5 x 107 volts
___d) 1.1 x 108 volts
___e) 1.7 x 108 volts

9. A parallel plate capacitor has both plates with an area of 0.55 m2. The separation between the plates is 0.53mm. Applied to the plates is a potential difference of 4.25 kV. What is the capacitance?

___a) 6.95 nF.
___b) 7.99 nF.
___c) 9.19 nF.
___d) 10.57 nF.
___e) 12.15 nF.

10. The same parallel plate capacitor, with area 1.05 m2, plate separation 0.63mm, and an applied voltage of 4.35 kV. How much charge is stored?

___a) 42.21 μC.
___b) 48.54 μC.
___c) 55.82 μC.
___d) 64.19 μC.
___e) 73.82 μC.

11. A 0.5 Farad capacitor is charged with 1.6 Coulombs. What is the value of the electric field if the plates are 0.7 mm apart?

___a) 3.46 kV/m.
___b) 3.98 kV/m.
___c) 4.57 kV/m.
___d) 5.26 kV/m.
___e) 6.05 kV/m.

12. A 1.4 Farad capacitor charged with 2.3 Coulombs. What is the energy stored in the capacitor if the plates are 0.6 mm apart?

___a) 1.08 J.
___b) 1.24 J.
___c) 1.43 J.
___d) 1.64 J.
___e) 1.89 J.

13. A 0.5 Farad capacitor charged with 1.6 Coulombs. What is the force between the plates if they are 0.7 mm apart?

___a) 3180 N.
___b) 3657 N.
___c) 4206 N.
___d) 4837 N.
___e) 5562 N.

14. A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?

___a) 4.06 x 10-2 W
___b) 4.92 x 10-2 W
___c) 5.96 x 10-2 W
___d) 7.22 x 10-2 W
___e) 8.75 x 10-2 W

15. The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)

___a) 3.82 x 10-4m/s
___b) 4.63 x 10-4m/s
___c) 5.61 x 10-4m/s
___d) 6.8 x 10-4m/s
___e) 8.24 x 10-4m/s

16. A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?

___a) 2.28 x 103 Ω
___b) 2.76 x 103 Ω
___c) 3.34 x 103 Ω
___d) 4.05 x 103 Ω
___e) 4.91 x 103 Ω

17. A power supply delivers 169 watts of power to a 219 ohm resistor. What was the applied voltage?

___a) 8.93 x 101 volts
___b) 1.08 x 102 volts
___c) 1.31 x 102 volts
___d) 1.59 x 102 volts
___e) 1.92 x 102 volts

18. An ideal 7.9 V voltage source is connected to two resistors in parallel. One is 2.4$k\Omega$ , and the other is 5.2 $k\Omega$ . What is the current through the larger resistor?

___a) 0.68 mA.
___b) 0.79 mA.
___c) 0.9 mA.
___d) 1.04 mA.
___e) 1.2 mA.

19. A 6.6 ohm resistor is connected in series to a pair of 6.4 ohm resistors that are in parallel. What is the net resistance?

___a) 6.4 ohms.
___b) 7.4 ohms.
___c) 8.5 ohms.
___d) 9.8 ohms.
___e) 11.3 ohms.

20. Two 6.4 ohm resistors are connected in parallel. This combination is then connected in series to a 6.6 ohm resistor. What is the net resistance?

___a) 8.5 ohms.
___b) 9.8 ohms.
___c) 11.3 ohms.
___d) 13 ohms.
___e) 14.9 ohms.

21. An ideal 7.5 volt battery is connected to a 0.084 ohm resistor. To measure the current an ammeter with a resistance of 14$m\Omega$ is used. What current does the ammeter actually read?

___a) 43.8 A.
___b) 50.3 A.
___c) 57.9 A.
___d) 66.5 A.
___e) 76.5 A.

22. A battery has an emf of 5.3 volts, and an internal resistance of 428 $k\Omega$ . It is connected to a 2.3 $M\Omega$ resistor. What power is developed in the 2.3 $M\Omega$ resistor?

___a) 4.96 $\mu$ W.
___b) 5.71 $\mu$ W.
___c) 6.56 $\mu$ W.
___d) 7.55 $\mu$ W.
___e) 8.68 $\mu$ W.

Key to TrigPhysT2_151021_Study-v1s1

1. What is the magnitude of the electric field at the origin if a 1.7 nC charge is placed at x = 6.4 m, and a 3 nC charge is placed at y = 8 m?

-a) 4.22 x 10-1N/C
-b) 4.87 x 10-1N/C
+c) 5.63 x 10-1N/C
-d) 6.5 x 10-1N/C
-e) 7.51 x 10-1N/C

2. What angle does the electric field at the origin make with the x-axis if a 2.8 nC charge is placed at x = -8 m, and a 1.5 nC charge is placed at y = -8.7 m?

+a) 2.44 x 101degrees
-b) 2.81 x 101degrees
-c) 3.25 x 101degrees
-d) 3.75 x 101degrees
-e) 4.33 x 101degrees

3. A dipole at the origin consists of charge Q placed at x = 0.5a, and charge of -Q placed at x = -0.5a. The absolute value of the x component of the electric field at (x,y) =( 5a, 5a) is βkQ/a2, where β equals

-a) 6.46 x 10-4 unit
-b) 7.82 x 10-4 unit
-c) 9.48 x 10-4 unit
-d) 1.15 x 10-3 unit
+e) 1.39 x 10-3 unit

4. A dipole at the origin consists of charge Q placed at x = 0.5a, and charge of -Q placed at x = -0.5a. The absolute value of the y component of the electric field at (x,y) =( 1.1a, 1.2a) is βkQ/a2, where β equals

-a) 1.95 x 10-1 unit
-b) 2.36 x 10-1 unit
-c) 2.86 x 10-1 unit
+d) 3.47 x 10-1 unit
-e) 4.2 x 10-1 unit

5. How fast is a 2672 eV electron moving?

-a) 6.1 x 106 m/s.
-b) 9.1 x 106 m/s.
-c) 1.4 x 107 m/s.
-d) 2 x 107 m/s.
+e) 3.1 x 107 m/s.

6. A proton is accellerated (at rest) from a plate held at 588.2 volts to a plate at zero volts. What is the final speed?

-a) 6.6 x 104 m/s.
-b) 10 x 104 m/s.
-c) 1.5 x 105 m/s.
-d) 2.2 x 105 m/s.
+e) 3.4 x 105 m/s.

7. What voltage is required accelerate an electron at rest to a speed of 1.5 x 103 m/s?

-a) 1.9 x 10-6 volts
-b) 2.8 x 10-6 volts
-c) 4.3 x 10-6 volts
+d) 6.4 x 10-6 volts
-e) 9.6 x 10-6 volts

8. What voltage is required to stop a proton moving at a speed of 8 x 107 m/s?

+a) 3.3 x 107 volts
-b) 5 x 107 volts
-c) 7.5 x 107 volts
-d) 1.1 x 108 volts
-e) 1.7 x 108 volts

9. A parallel plate capacitor has both plates with an area of 0.55 m2. The separation between the plates is 0.53mm. Applied to the plates is a potential difference of 4.25 kV. What is the capacitance?

-a) 6.95 nF.
-b) 7.99 nF.
+c) 9.19 nF.
-d) 10.57 nF.
-e) 12.15 nF.

10. The same parallel plate capacitor, with area 1.05 m2, plate separation 0.63mm, and an applied voltage of 4.35 kV. How much charge is stored?

-a) 42.21 μC.
-b) 48.54 μC.
-c) 55.82 μC.
+d) 64.19 μC.
-e) 73.82 μC.

11. A 0.5 Farad capacitor is charged with 1.6 Coulombs. What is the value of the electric field if the plates are 0.7 mm apart?

-a) 3.46 kV/m.
-b) 3.98 kV/m.
+c) 4.57 kV/m.
-d) 5.26 kV/m.
-e) 6.05 kV/m.

12. A 1.4 Farad capacitor charged with 2.3 Coulombs. What is the energy stored in the capacitor if the plates are 0.6 mm apart?

-a) 1.08 J.
-b) 1.24 J.
-c) 1.43 J.
-d) 1.64 J.
+e) 1.89 J.

13. A 0.5 Farad capacitor charged with 1.6 Coulombs. What is the force between the plates if they are 0.7 mm apart?

-a) 3180 N.
+b) 3657 N.
-c) 4206 N.
-d) 4837 N.
-e) 5562 N.

14. A 5.1 volt battery moves 43 Coulombs of charge in 1.5 hours. What is the power?

+a) 4.06 x 10-2 W
-b) 4.92 x 10-2 W
-c) 5.96 x 10-2 W
-d) 7.22 x 10-2 W
-e) 8.75 x 10-2 W

15. The diameter of a copper wire is 3.6 mm, and it carries a current of 52 amps. What is the drift velocity if copper has a density of 8.8E3 kg/m3 and an atomic mass of 63.54 g/mol? (1 mol = 6.02E23 atoms, and copper has one free electron per atom.)

+a) 3.82 x 10-4m/s
-b) 4.63 x 10-4m/s
-c) 5.61 x 10-4m/s
-d) 6.8 x 10-4m/s
-e) 8.24 x 10-4m/s

16. A 146 Watt DC motor draws 0.23 amps of current. What is effective resistance?

-a) 2.28 x 103 Ω
+b) 2.76 x 103 Ω
-c) 3.34 x 103 Ω
-d) 4.05 x 103 Ω
-e) 4.91 x 103 Ω

17. A power supply delivers 169 watts of power to a 219 ohm resistor. What was the applied voltage?

-a) 8.93 x 101 volts
-b) 1.08 x 102 volts
-c) 1.31 x 102 volts
-d) 1.59 x 102 volts
+e) 1.92 x 102 volts

18. An ideal 7.9 V voltage source is connected to two resistors in parallel. One is 2.4$k\Omega$ , and the other is 5.2 $k\Omega$ . What is the current through the larger resistor?

-a) 0.68 mA.
-b) 0.79 mA.
-c) 0.9 mA.
+d) 1.04 mA.
-e) 1.2 mA.

19. A 6.6 ohm resistor is connected in series to a pair of 6.4 ohm resistors that are in parallel. What is the net resistance?

-a) 6.4 ohms.
-b) 7.4 ohms.
-c) 8.5 ohms.
+d) 9.8 ohms.
-e) 11.3 ohms.

20. Two 6.4 ohm resistors are connected in parallel. This combination is then connected in series to a 6.6 ohm resistor. What is the net resistance?

-a) 8.5 ohms.
+b) 9.8 ohms.
-c) 11.3 ohms.
-d) 13 ohms.
-e) 14.9 ohms.

21. An ideal 7.5 volt battery is connected to a 0.084 ohm resistor. To measure the current an ammeter with a resistance of 14$m\Omega$ is used. What current does the ammeter actually read?

-a) 43.8 A.
-b) 50.3 A.
-c) 57.9 A.
-d) 66.5 A.
+e) 76.5 A.

22. A battery has an emf of 5.3 volts, and an internal resistance of 428 $k\Omega$ . It is connected to a 2.3 $M\Omega$ resistor. What power is developed in the 2.3 $M\Omega$ resistor?

-a) 4.96 $\mu$ W.
-b) 5.71 $\mu$ W.
-c) 6.56 $\mu$ W.
-d) 7.55 $\mu$ W.
+e) 8.68 $\mu$ W.

Attribution (for quiz questions) under CC-by-SA license
http://en.wikiversity.org/w/index.php?title=Physics_equations/18-Electric_charge_and_field/Q:findE&oldid=1378605
http://en.wikiversity.org/w/index.php?title=Physics_equations/20-_Electric_Current,_Resistance,_and_Ohm%27s_Law/Q:PowerDriftVelocity&oldid=1391116
http://en.wikiversity.org/w/index.php?title=Physics_equations/21-Circuits,_Bioelectricity,_and_DC_Instruments/Q:circuits&oldid=1391123
Study guide
http://en.wikiversity.org/wiki/Physics_equations/Sheet/All_chapters