How many times per second will an incandescent lamp reach maximum brilliance when connected to a 50 Hz source?
Correct answer: C. 100 times
- A. 50 times
- B. 200 times
- C. 100 times
- D. 150 times
Explanation
The explanation is: In one cycle, the current becomes maximum twice (positive peak and negative peak). So the lamp will glow a maximum of twice in one cycle. As the frequency of the source is 50 Hz, the maximum brilliance shown by the lamp is given by: Max brilliance of lamp per second = twice the frequency of source = 2(50) times = 100 times
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