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Question

A closely wound solenoid 40 cm long has 5 layers of

windings of 400 turns each. The diameter of the solenoid is 2 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its centre.

A 16π × 10^−3 T

B 16π × 10^−4 T

C 16π × 10^−2 T

D 16π × 10^−5 T

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