- AElectrostatic potential = Work done × charge
- BElectrostatic potential = Work done/ charge
- CElectrostatic potential = Work done + charge
- DElectrostatic potential = Work done - charge
Explanation:
The formula for electrostatic potential is Electrostatic potential = Work done/ charge.
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The potential at a point due to an electric dipole will be maximum and minimum when the angles between the axis of the dipole and the line joining the point to the dipole are respectively
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(a) 90° and 180 ° |
(b) 0° and 90° |
(c) 90 ° and 0° |
(d) 0° and 180° |
Assertion : Cyclotron is a device which is used to accelerate the positive ion.
Reason : Cyclotron frequency depends upon the velocity.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
What is the area of the plates of a 3F parallel plate capacitor, if the separation between the plates is 5mm
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(a) 1.694 |
(b) 4.529 |
(c) 9.281 |
(d) 12.981 |


For a metallic wire, the ratio V/i (V = the applied potential difference, i = current flowing) is
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(a) Independent of temperature |
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(b) Increases as the temperature rises |
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(c) Decreases as the temperature rises |
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(d) Increases or decreases as temperature rises, depending upon the metal |
A LC circuit is in the state of resonance. If C = 0.1μF and L = 0.25 henry. Neglecting ohmic resistance of circuit what is the frequency of oscillations
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(a) 1007 Hz |
(b) 100 Hz |
(c) 109 Hz |
(d) 500 Hz |
A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm. On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature 10 cm be placed in order to have an upright image of the object coincident with it
| (a) 12 cm | (b) 30 cm |
(c) 50 cm |
(d) 60 cm |