- AArea of the plate is decreased.
- BArea of the plate is increased.
- CDistance between the plates increases.
- DNone of the option.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A combination of two thin lenses of the same material with focal lengths
and
, arranged on a common axis minimizes chromatic aberration, if the distance between them is
|
(a) |
(b) |
(c) ( |
(d) |
Light passes successively through two polarimeters tubes each of length 0.29m. The first tube contains dextro rotatory solution of concentration 60kgm–3 and specific rotation 0.01rad m2kg–1. The second tube contains laevo rotatory solution of concentration 30kg/m3 and specific rotation 0.02 radm2kg–1. The net rotation produced is
|
(a) 15° |
(b) 0° |
(c) 20° |
(d) 10° |
The magnetic compass is not useful for navigation near the magnetic poles because
|
(a) The magnetic field near the poles is zero |
|
(b) The magnetic field near the poles is almost vertical |
|
(c) At low temperature, the compass needle looses its magnetic properties |
|
(d) Neither of the above |
A current of 5 ampere is flowing in a wire of length 1.5 metres. A force of 7.5 N acts on it when it is placed in a uniform magnetic field of 2 Tesla. The angle between the magnetic field and the direction of the current is
|
(a) 30° |
(b) 45° |
(c) 60° |
(d) 90° |