__________ will be least affected due to charge in supply voltage frequency.
Correct answer: D. Room heater
- A. Electric clock
- B. Mixer grinder
- C. Ceiling fan
- D. Room heater
Explanation
A room heater is essentially a resistive load, so its operation is practically independent of supply frequency, unlike clocks, fans and mixers that depend on motor speed or electromagnetic timing. Hence it is least affected by a frequency change.
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