COMEDK · Physics · 23. Alternating Current
The AC voltage across a resistance can be measured using a
- A hot wire voltmeter
- B moving coil galvanometer
- C potential coil galvanometer
- D moving magnet galvanometer
Answer & Solution
Correct Answer
(A) hot wire voltmeter
Step-by-step Solution
Detailed explanation
A hot wire voltmeter operates on the principle of the heating effect of electric current, where the heat produced is proportional to the square of the current, \(H = I^2Rt\). Since the heating effect is independent of the direction of the current, it can measure both alternating…
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