A capacitor of capacitance $$C$$ is charged to a potential $$V.$$ The flux of the electric field through a closed surface enclosing the capacitor is:
1. $$CV \over \varepsilon_0$$
2. $$2 CV \over \varepsilon_0$$
3. $$CV \over2 \varepsilon_0$$
4. zero

Subtopic:  Capacitance |
62%
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A parallel-plate capacitor has plates of unequal area. The larger plate is connected to the positive terminal of the battery and the smaller plate to its negative terminal. Let Q+ and Q- be the charges appearing on the positive and negative plates respectively.

1.  Q+ > Q

2.  Q+ = Q–

3.  Q+ < Q-

4.  The information is not sufficient to decide the relation between Q+ and Q

Subtopic:  Capacitance |
69%
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A thin metal plate P is inserted between the plates of a parallel-plate capacitor of capacitance $$C$$ in such a way that its edges touch the two plates (shown in the figure). The capacitance now becomes:

1. $$C/2$$
2. $$2C$$
3. $$0$$
4. $$\infty$$

Subtopic:  Capacitance |
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The capacitance of a capacitor does not depend on:

 a. the shape of the plates. b. the size of the plates. c. the charges on the plates. d. the separation between the plates.

Choose the correct option:

 1 (a) , (b) 2 (b) , (c) 3 (c) only 4 (a) , (d)
Subtopic:  Capacitance |
72%
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Each plate of a parallel plate capacitor has a charge q on it. The capacitor is now connected to a battery. Now,

(a) the facing surfaces of the capacitor have equal and opposite charges.

(b) the two plates of the capacitor have equal and opposite charges.

(c) the battery supplies equal and opposite charges to the two plates.

(d) the outer surfaces of the plates have equal charges

Choose the correct option

1.  (a) , (b) , (c)

2. (b) , (c) , (a)

3. (c) , (d) , (a)

4. (a) , (c) , (d)

Subtopic:  Capacitance |
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A capacitor with no dielectric is connected to a battery at t = 0. Consider a point A in the connecting wires and a point B in between the plates.
a. There is no current through A.
b. There is no current through B.
c. There is a current through A as long as the charging is not complete.
d. There is a current through B as long as the charging is not complete.
Choose the correct option:
1. (a) only
2. (b), (c)
3. (c), (d)
4. (a), (d)

Subtopic:  Capacitance |
52%
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