MHT CET 2025 Physics question

A coil has inductance 2 H. The ratio of its reactance when it is connected first to an a.c. source and then to a d.c. source is

(A)-1
(B)zero
(C)Correct
(D)+1

Answer: (C)

Solution

The inductive reactance is . For an a.c. source of non-zero frequency, (finite). For a d.c. source (so ) and : an inductor offers no reactance to steady current. Hence the

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Question ID VK-102049