- ANon-Coherent
- ✓Coherent
- CPartial Coherent
- DCan't say anything.
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When a positive q charge is taken from lower potential to a higher potential point, then its potential energy will
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(a) Decrease |
(b) Increases |
(c) Remain unchanged |
(d) Become zero |
Point charges +4q, -q and +4q are kept on the x - axis at points x = 0, x = a and x = 2a respectively, then
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(a) Only q is in stable equilibrium |
(b) None of the charges are in equilibrium |
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(c) All the charges are in unstable equilibrium |
(d) All the charges are in stable equilibrium |

Assertion : Charge is invariant.
Reason : Charge does not depends on speed of frame of reference.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(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. |
|
(d) If the assertion and reason both are false. |
The direction of the null points is on the equatorial line of a bar magnet, when the north pole of the magnet is pointing
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(a) North |
(b) South |
(c) East |
(d) West |