- ALaser beam
- BWhite light
- CSodium light
- DMercury light
Explanation:
Monochromatic light is light made up of one single pure frequency.white light, which is light that contains all frequencies, That means the sum of red, yellow, green, blue and violet. Some light sources send out monochromatic light such as lasers beam.
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When
ampere current is passed in a tangent galvanometer, there is a deflection of 30° in it. The deflection obtained when 3 amperes current is passed, is
| (a) 30° | (b) 45° | (c) 60° | (d) 75° |
Three semi-conductors are arranged in the increasing order of their energy gap as follows. The correct arrangement is
|
(a) Tellurium, germanium, silicon |
(b) Tellurium, silicon, germanium |
|
(c) Silicon, germanium, tellurium |
(d) Silicon, tellurium, germanium |
Which of the following figures correctly shows the phase relation between the input signal and the output signal of triode amplifier
|
(a) |
(b) |
|
(c) |
(d) |