The current drawn by the primary of a transformer, which steps down 200 V to 20 V to…
Physics · Class 12 · CBSE — Alternating Current
The current drawn by the primary of a transformer, which steps down 200 V to 20 V to operate a device of resistance 20 W is
(Assume the efficiency of the transformer to be 80 %)
(Assume the efficiency of the transformer to be 80 %)
- 0.125 A
- 0.225 A
- 0.325 A
- 0.425 A
Answer
(A) 0.125 A
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