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## Objective Questions and Answers

An objective-type examination improves sharpness, prudent judgement, depth of knowledge, overall understanding, logic and concepts of the subject. A subjective-type examination improves communicaion and explanatory skills of the subject.

1. If Coulomb’s force on 2 C due to 5 C is 10ax (N), the force on 5 C due to 2 C is
1. –10a x (N)
2. 10a x (N)
3. 10ay (N)
4. –10ay (N)
2. Gradient of a potential and equipotential surface are
1. orthogonal to each other
2. in the same direction
3. out of phase
4. at 45° with one another
3. The work in moving a charge between two points depends on
1. the path
2. Q, E and the path
3. Q and E only
4. Q, E and end points
4. Unit of potential is
1. Joules
2. N/C
3. N/Joules
4. Joules/C
5. Field due to infinitely long line charge ...

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