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A long cylindrical wire carrying curren...

A long cylindrical wire carrying current of `10 A` has radius of `5 mm` find its its magnetic field induction at a point `2 mm` from the centre of the wire

A

`16xx10^(-4)T`

B

`2.4xx10^(-4)T`

C

`3.2xx10^(-4)T`

D

`0.8xx10^(-4)T`

Text Solution

Verified by Experts

The correct Answer is:
A
`B=(mu_(0)Ir)/(2piR^2)`
`=B=(4pi xx 10^(-7)xx10xx2xx10^-3)/(2pixx(5xx10^(-3))^(2))=(40xx10^(-10))/(25xx10^(-6))=1.6xx10^(-4)T`
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