An electromagnet has stored 648 J of magnetic energy when a current of 9 A exists in its…
Physics · Class 12 · CBSE — Electromagnetic Induction
An electromagnet has stored 648 J of magnetic energy when a current of 9 A exists in its coils. What average emf is induced if the current is reduced to zero in 0.45 s?
- 320 V
- 620 V
- 260 V
- 230 V
Answer
(A) 320 V
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