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Q. No.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
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
A dielectric slab is inserted between the plates of an isolated charged capacitor. Which of the following quantities will remain the same?
| (a) | the electric field in the capacitor |
| (b) | the charge on the capacitor |
| (c) | the potential difference between the plates |
| (d) | the stored energy in the capacitor |
Choose the correct option:
1. (a), (b)
2. (b) only
3. (c), (a)
4. (a), (d)
| a. | \(Q'\) may be larger than \(Q.\) |
| b. | \(Q'\) must be larger than \(Q.\) |
| c. | \(Q'\) must be equal to \(Q.\) |
| d. | \(Q'\) must be smaller than \(Q.\) |
Choose the correct option:
| 1. | (a), (b) |
| 2. | (b), (c) |
| 3. | (d) only |
| 4. | (a), (d) |
A parallel-plate capacitor is connected to a battery. A metal sheet of negligible thickness is placed between the plates. The sheet remains parallel to the plates of the capacitor.
| (a) | The battery will supply more charge. |
| (b) | The capacitance will increase. |
| (c) | The potential difference between the plates will increase. |
| (d) | Equal and opposite charges will appear on the two faces of the metal plate |
Choose the correct option from the given ones:
| 1. | (a) and (b) only |
| 2. | (b) and (c) only |
| 3. | (d) only |
| 4. | (a) and (d) only |
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Q. No.
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