MHT CET 2024 Physics question
A coil has inductance H. the ratio of its reactance when it is connected first to an a.c. source and then to d.c. source is
Answer: (A)
Solution
The inductive reactance is . For an a.c. source of non-zero frequency, is finite and non-zero. For a d.c. source the frequency is , so (the coil offers only its ohmic resistance). Therefore
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