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WBCS Main Examination 2023 — Paper IV: General Studies II · Question 169 of 200

Q169
General SciencePhysics
What is the frequency of supply A.C. (current) in India?
  1. a.220 Hz
  2. b.60 Hz
  3. c.50 Hz
  4. d.40 Hz

Answer: (C) 50 Hz

India's mains supply is 230 V (often quoted as 220 V) at 50 Hz. 60 Hz is used in the USA and some other countries, and 220 is the voltage, not the frequency.

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