Explanation:
We know that for a conducting sphere, the charge is always distributed on its outer surface. We also know that charge flows from higher potential to lower potential. But if we put the smaller sphere inside the larger sphere and connect them with a conductor, they will act as a single conductor and charge will be distributed to its outer surface, i.e. charge will flow to the larger sphere.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A virtual image is:
A magnet of magnetic moment 20 C.G.S. units is freely suspended in a uniform magnetic field of intensity 0.3 C.G.S. units. The amount of work done in deflecting it by an angle of 30o in C.G.S. units is
|
(a) 6 |
(b) 3 |
(c) 3(2 - |
(d) 3 |
A point source of light is placed 4 m below the surface of water of refractive index 5 / 3. The minimum diameter of a disc which should be placed over the source on the surface of water to cut–off all light coming out of water is
|
(a) 2 m |
(b) 6 m |
(c) 4 m |
(d) 3 m |
The focal length of a converging lens are fv and fr for violet and red light respectively:
Two stars P and Q are observed at night. Star P appears reddish while, star Q is white. From this we conclude
|
(a) Temperature of Q is higher than that of P |
|
(b) Temperature of Q is lower than that of P |
|
(c) Star Q is at the same distance at that of star P |
|
(d) Star P is farther than star Q |
Nuclear forces are
|
(a) Short ranged attractive and charge independent |
|
(b) Short ranged attractive and charge dependent |
|
(c) Long ranged repulsive and charge independent |
|
(d) Long ranged repulsive and charge dependent |
