- ARectilinear
- BZig zag
- CCircular
- DHelical
Explanation:
Light travels in straight line unless it passes through a change in medium.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The electron in the beam of a television tube move horizontally from south to north. The vertical component of the earth's magnetic field points down. The electron is deflected towards
|
(a) West |
(b) No deflection |
(c) East |
(d) North to south |
The ratio of areas within the electron orbits for the first excited state to the ground state for hydrogen atom is
| (a) 16 : 1 | (b) 18 : 1 | (c) 4 : 1 | (d) 2 : 1 |
The alloys constantan and manganin are used to make standard resistance due to they have
|
(a) Low resistivity |
(b) High resistivity |
|
(c) Low temperature coefficient of resistance |
(d) Both (b) and (c) |

A bar magnet is placed north-south with its north pole due north. The points of zero magnetic field will be in which direction from the centre of the magnet
| (a) North and south | (b) East and west |
| (c) North-east and south-west | (d) North-west and south-east |