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A solenoid of length 1.5 m and diameter ...

 A solenoid of length 1.5 m and diameter 4 cm has 10 turns per meter. A current of 5A is passing through it. The magnetic induction at a point inside the solenoid along the axis is

A

`pi xx 10^-5 T`

B

`2pi xx 10^-5 T`

C

`3pi xx 10^-5 T`

D

`4pi xx 10^-5 T`

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