MHT CET 2024 Physics question
When 100 V d.c. is applied across a solenoid, a current of 1A flows in it. When 100 V a.c. is applied across it, the current drops to 05 A. If the frequency is 50Hz, the impedance and inductance is
Answer: (A)
Solution
With d.c. the inductor offers no reactance, so the resistance is . With a.c. the impedance is . From : . Since :
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