1. \(C\)
2. \(2C\)
3. \(\dfrac{C}{2}\)
4. none of these
A dielectric slab is inserted between the plates of an isolated capacitor. The force between the plates will:
1. increase
2. decrease
3. remain unchanged
4. become zero
The energy density in the electric field created by a point charge falls off with the distance from the point charge as
1. \(1 \over r\)
2. \(1 \over r^2\)
3. \(1 \over r^3\)
4. \(1 \over r^4\)
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–
1. \(C/2\)
2. \(2C\)
3. \(0\)
4. \(\infty \)
1. \(C_{1}>C_{2}\)
2. \(C_{1}=C_{2}\)
3. \(C_{1}<C_{2}\)
4. the information is not sufficient to decide the relation between \(C_{1}\) and \(C_{2}\)
Two metal plates having charges \(Q,\) \(-Q\) face each other at some separation and are dipped into an oil tank. If the oil is pumped out, the electric field between the plates will:
1. increase
2. decrease
3. remain the same
4. become zero
Three capacitors of capacitances \(6\) µF each are available. The minimum and maximum capacitances, which may be obtained are:
1. \(6~\mu\text{F}, 18~\mu\text{F}\)
2. \(3~\mu\text{F}, 12~\mu\text{F}\)
3. \(2~\mu\text{F}, 12~\mu\text{F}\)
4. \(2~\mu\text{F}, 18~\mu\text{F}\)
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) |