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A solenoid 50 cm long has 4 layers of wi...

A solenoid 50 cm long has 4 layers of windings of 350 turns each. If the current carried is 6A, find the magnetic field at the centre of the solenoid.

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Here length =50 cm=0.5 m
i=6A
Number of turns per unit length = n =`4xx350/0.5=2800m^(-1)`
Magnetic field at the centre = `mu_(0) ni = 4pixx10^(-7)xx2800xx6 = 2.11x×10^(-2)T`
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