MHT CET 2024 Physics question
When a coil is connected to a d.c. source of e.m.f. 12 volt, then the current of 4A flows in it. If the same coil is connected to a 12 volt, 50 Hz a.c. source, then the current flowing in it is 2.4 A. Then self-inductance of the coil will be
Answer: (C)
Solution
With d.c. only the resistance limits the current: . With a.c. the impedance is . Since , . Now , so $L =
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