1. A 4.0-g bead carries a charge of 20 C. The bead is accelerated from rest through a potential difference V, and afterward, the bead is moving at 2.0 m/s. What is the magnitude of the potential difference V? *

a. 400 kV

b. 200 V

c. 800 kV

d. 400 V

2. How much work must we do on an electron to move it from point A, which is at a potential of +50V, to point B, which is at a potential of -50 V, along the semicircular path? Assume the system is isolated from outside forces. (e = 1.60 10-19 C)

a. 1.6 J

b. 1.60 10^-17 J

c. -1.60 10^-17 J

d. -1.6 J

3. When 3 capacitors are arranged in series, the equivalent capacitance C is

a. Ceq = C1 + C2 + C3

b. 1/Ceq = 1/C1 + 1/C2 + 1/C3

c. Ceq = QV1 + QV2 + QV3

d. Ceq = CR1 + CR2 + CR3

4. A proton that is initially at rest is accelerated through an electric potential difference of magnitude 500 V. What speed does the proton gain? (e = 1.60 10-19 C , mproton = 1.67 10-27 kg)

a. 2.2 105 m/s

b. 1.1 105 m/s

c. 9.6 105 m/s

d. 3.1 105 m/s

5. A 1 micro F capacitor is charged using a constant current of 10 microAmpere for 20 seconds. What is the energy stored by the capacitor?

a. 4 x 10^-4 J

b. 4 x 10^-2 J

c. 2 x 10^-2 J

d. 2 x 10^-4 J

6. A capacitor of capacitance C is charged using a battery. The charge on the capacitor is Q and the potential difference across it is V. The battery is removed, and an identical capacitor which is not charged is connected in parallel to the charged capacitor. Which of the following statements is correct?

a. The potential difference across both the capacitors is V

b. Total energy stored remains the same

c. The final charge on each capacitor is Q/2

d. The effective capacitance is C/2

7. Which statements must be true about the surface of a charged conductor in which no charge is moving?

a. The electric field is constant at the surface.

b. The electric field is zero at the surface.

c. The electric potential is constant over the surface.

d. The electric potential of the surface is zero.

8. When 3 capacitors are arranged in parallel, the equivalent capacitance is

a. Ceq = C1 + C2 + C3

b. Ceq = 1/C1 + 1/C2 + 1/C3

c. C = QV1 + QV2 + QV3

d. 1/Ceq = 1/C1 + 1/C2 + 1/C3

9. Which of the following statements DOES NOT describe a capacitor an electrical device?

a. It is used to smooth out unwanted fluctuations due to power surges in electronic circuits.

b. It stores charge and electrical potential energy.

c. It allows current to pass through in any condition.

d. It is manufactured in many sizes and shapes.

10. Two capacitors X and Y of capacitances 2 F and 4 F respectively are connected in series witha 12 battery. Which of the following statements is CORRECT?

The potential difference across the capacitor X is 8 V.

Capacitors have the same charge of 36 C.

The potential difference across the capacitors Y is 12 V.

The effective capacitance is 6 F.

11. A parallel-plate capacitor has a capacitance of 20 F. What potential difference across the plates is required to store 7.2 x 10-4 C on this capacitor?

a. 2.2 x 10-2 V

b. 68 V

c. 1.4 x 10-8 V

d. 36 V

12. Total capacitance of 300 mF capacitor and a 600 mF in series is

500 mF

300 mF

1000 mF

200 mF

13. Capacitor C1 is connected across a battery of 5 V. An identical capacitor C2 is connected across a battery of 10 V. Which one has the most charge?

a. it depends on other factors

b. both have the same charge

c. C1

d. C2

14. What is the potential difference across a capacitor on a 5 F when the charge of capacitor is 120 C ?

a. 21 V

b. 23 V

c. 22 V

d. 24 V

15. If a charge's magnitude increases, what will happen to its potential difference?

a. It remains the same

b. It reduces to zero

c. It increases.

d. It decreases

16. In a parallel-plate capacitor, how can the capacitance be increased?

a. insert dielectric

b. increase the stored charge

c. increase the plate separation

d. decrease the cross sectional area

17. As a proton moves in the direction the electric field lines...

a. it is moving from high potential to low potential and gaining electric potential energy.

b. it is moving from low potential to high potential and gaining electric potential energy.

c. it is moving from low potential to high potential and losing electric potential energy.

d. it is moving from high potential to low potential and losing electric potential energy.

18. During charging a capacitor through a resistor

a. the current in the circuit decreases linearly with time

b. the current in the circuit increases exponentially with time

c. the current in the circuit increases linearly with time

d. the current in the circuit decreases exponentially with time

19. What is true for an electron moving through a field, from a low potential to a high potential?

a. Work done by the E is negative.

b. Work done by the E is positive.

c. Both B and C

d. Electric potential energy increases.

20. Electrostatic potential energy is recorded in units of electron-Volts (eV). What is equivalent to 1 eV?

a. 0.003

b. 220

c. 100

d. 1.6021019

21. The electric potential at a distance of 4 m from a certain point charge is 200 V relative to infinity. What is the potential (relative to infinity) at a distance of 2 m from the same charge?

a. 50 V

b. 600 V

c. 200 V

d. 400 V

22. It is the difference between two points A and B is the work per unit positive charge done by forces in moving a small test charge from the point of higher potential to the point of lower potential.

a. Potential Energy

b. Electric Potential Energy

c. Kinetic Energy

d. Electric Potential Difference

23. It is a stored energy that depends upon the relative position of various parts of a system

a. Mechanical Energy

b. Kinetic Energy

c. Potential Energy

d. Electric Potential