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A long solenoid has 200 turns per cm and...

A long solenoid has 200 turns per cm and carries a current of 2.5 amps. The magnetic field at its centre is `(mu_(0)=4pixx10^(-7)"weber"//amp-m)`

A

`3.14 xx 10^(-2) Wb//m^(2)`

B

`6.28 xx 10^(-2) Wb//m^(2)`

C

`9.42 xx 10^(-2) Wb//m^(2)`

D

`12.56 xx 10^(-2) Wb//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`B = mu_(0) nl = 4pi xx 10^(-7) xx (200)/(10^(-2)) xx 2.5`
`rArr " "B = 6.28 xx 10^(-2) Wb//m^(2)`
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