- 1(current)
Q. No.On rotating a point charge having a charge \(q\) around a charge \(Q\) in a circle of radius \(r\), the work done will be:
| 1. | \(q \times2 \pi r\) | 2. | \(q \times2 \pi Q \over r\) |
| 3. | zero | 4. | \(Q \over 2\varepsilon_0r\) |
Subtopic: Â Equipotential Surfaces |
 89%
From NCERT
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The work done to move a charge along an equipotential from A to B:
| 1. | can not be defined as \(-\int_{\mathrm{A}}^{\mathrm{B}} \text { E. dl. }\) |
| 2. | must be defined as \(-\int_{\mathrm{A}}^{\mathrm{B}} \text { E. dl. }\) |
| 3. | is zero |
| 4. | can have a non-zero value. |
Subtopic: Â Equipotential Surfaces |
 91%
From NCERT
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A cube of a metal is given a positive charge Q. For the above system, which of the following statements is true?
| 1. | Electric potential at the surface of the cube is zero. |
| 2. | Electric potential within the cube is zero. |
| 3. | Electric field is normal to the surface of the cube. |
| 4. | Electric field varies within the cube. |
Subtopic: Â Equipotential Surfaces |
 77%
From NCERT
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Consider a uniform electric field in the Z-direction. The potential is constant:
| a. | in all space |
| b. | for any x for a given z |
| c. | for any y for a given z |
| d. | on the x-y plane for a given z |
1. (a, b, c)
2. (a, c, d)
3. (b, c, d)
4. (c, d)
Subtopic: Â Equipotential Surfaces |
 78%
From NCERT
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Some equipotential surfaces are shown in figure. The electric field at points A, B and C are respectively:
| 1. | \(1 \mathrm{~V} / \mathrm{cm}, \frac{1}{2} \mathrm{~V} / \mathrm{cm}, 2 \mathrm{~V} / \mathrm{cm} \text { (all along +ve X-axis) }\) |
| 2. | \(1 \mathrm{~V} / \mathrm{cm}, \frac{1}{2} \mathrm{~V} / \mathrm{cm}, 2 \mathrm{~V} / \mathrm{cm} \text { (all along -ve X-axis) }\) |
| 3. | \(\frac{1}{2} \mathrm{~V} / \mathrm{cm}, 1 \mathrm{~V} / \mathrm{cm}, 2 \mathrm{~V} / \mathrm{cm} \text { (all along +ve X-axis) }\) |
| 4. | \(\frac{1}{2} \mathrm{~V} / \mathrm{cm}, 1 \mathrm{~V} / \mathrm{cm}, 2 \mathrm{~V} / \mathrm{cm} \text { (all along -ve X-axis) }\) |
Subtopic: Â Equipotential Surfaces |
 69%
From NCERT
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- 1(current)
Q. No.
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