Point charge 
and 
are kept at points x = 0 and x = 6 respectively. Electrical potential will be zero at points
|
(a) x = 2 and x = 9 |
(b) x = 1 and x = 5 |
(c) x = 4 and x = 12 |
(d) x = -2 and x = 2 |
(c) x = 4 and x = 12
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A very small magnet is placed in the magnetic meridian with its south pole pointing north. The null point is obtained 20 cm away from the centre of the magnet. If the earth's magnetic field (horizontal component) at this point be 0.3 gauss, the magnetic moment of the magnet is
(a) 8.0
|
(b) 1.2 
|
(c) 2.4
|
(d) 3.6
|
The ratio of the intensity at the centre of a bright fringe to the intensity at a point one-quarter of the distance between two fringe from the centre is
|
(a) 2 |
(b) 1/2 |
(c) 4 |
(d) 16 |