A circular coil of radius 5 cm has 500 turns of a wire. The approximate value of the coefficient of self-induction of the coil will be
A
25 millihenry
B
millihenry C
millihenry
D
henry
Text Solution
Verified by ExpertsThe correct answer is:
A
Since magnetic field at the center of circular coil carrying current is given by 
Hence, self-inductance of a coil
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