1.

A solenoid length 0.4cm, radius 1 cm and 400 turns of wire. If a current of 5 A is passed through this solenoid, what is the magnetic field inside the solenoid ?

Answer»

`6.28 xx 10^(-4)T`
`6.28 xx 10^(-3)T`
`6.28 xx 10^(-7)T`
`6.28 xx 10^(-6)T`

Solution :`B = mu_(0)nI (N = N//L)`
`= 4 xx 3.14 xx 10^(-7) xx (400)/(0.4 xx 10^(-2)) xx 5`
`0.628 T`


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