When a positive q charge is taken from lower potential to a higher potential point, then its potential energy will
|
(a) Decrease |
(b) Increases |
(c) Remain unchanged |
(d) Become zero |
(b) Increases
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A charge Q is divided into two parts of q and Q - q. If the coulomb repulsion between them when they are separated is to be maximum, the ratio of 
should be
|
(a) 2 |
(b) 1/2 |
(c) 4 |
(d) 1/4 |
In a good conductor the energy gap between the conduction band and the valence band is
|
(a) Infinite |
(b) Wide |
(c) Narrow |
(d) Zero |
Evidence for the wave nature of light cannot be obtained from
|
(a) Reflection |
(b) Doppler effect |
(c) Interference |
(d) Diffraction |
A 5.0 amp current is setup in an external circuit by a 6.0 volt storage battery for 6.0 minutes. The chemical energy of the battery is reduced by
|
(a) 1.08 × 104 J |
(b) 1.08 × 10-4 volt |
(c) 1.8 × 104 J |
(d) 1.8 × 104 volt |
For the magnetic field to be maximum due to a small element of current carrying conductor at a point, the angle between the element and the line joining the element to the given point must be
|
(a) 0° |
(b) 90° |
(c) 180° |
(d) 45° |
Two charge + q and -q are situated at a certain distance. At the point exactly midway between them
|
(a) Electric field and potential both are zero |
|
(b) Electric field is zero but potential is not zero |
|
(c) Electric field is not zero but potential is zero |
|
(d) Neither electric field nor potential is zero |