MCQ
Which magnetic materials have negative susceptibility?
- ADiamagnetic materials.
- BParamagnetic materials.
- CFerromagnetic materials.
- DAll the above.
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The permanent magnet is made from which one of the following substances
| (a) Diamagnetic | (b) Paramagnetic | (c) Ferromagnetic | (d) Electromagnetic |
The distance between the two charges +q and -q of a dipole is r. On the axial line at a distance d from the centre of dipole, the intensity is proportional to
|
(a) |
(b) |
(c) |
(d) |
A small object is placed 10 cm infront of a plane mirror. If you stand behind the object 30 cm from the mirror and look at its image, the distance focused for your eye will be
|
(a) 60 cm |
(b) 20 cm |
(c) 40 cm |
(d) 80 cm |
