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A closely wound solenoid 80 cm long has ...

A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its centre.

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`8pi xx 10^(-3) T ~~ 2.5 xx 10^(-2) T`
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