Question

The frequency of ac mains in India is(a) 30 c/s or Hz(b) 50 c/s or Hz(c) 60 c/s or Hz(d) 120 c/s or Hz

Answer 1

(b) 50 c/s or Hz
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Answer 2

Answer:

The frequency of ac mains in India is (b) 50 c/s or Hz.

The frequency as well as voltage varies from one country to another. The most efficient one is a combination of 60 Hz and 220 V.

50 Hz or 60 Hz is the optimum frequency that helps in maintaining the transmission losses to a tolerable limit.