Sources of Light MCQ - Electrician (Set-1) with Answers

Sources of Light MCQ - Electrician (Set-1) with Answers

1) The lumen output of a 230 volts, 100 watts gas-filled lamp is approximately :

Answer is:

1200

Explanation:

.

2) The principle of working of a H.P.M.V. lamps is that

Answer is:

the radiation is produced directly by the discharge

3) Low pressure in a fluorescent tube is obtained by :

Answer is:

low current density

4) When fluorescent lamps are used to replace incandescent bulbs usually :

Answer is:

greater illumination occurs

5) If the starter of a glowing tube-light is withdrawn then the tube-light :

Answer is:

will continue to glow