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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

`1.6xx10^(-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:
B
`B = (mu_(0) Ir)/(2pi R^(2))`
`B = (4pix10^(-7)xx10xx2xx10^(-3))/(2pi xx (5xx10^(-3))^(2))`
`= (40xx10^(-10))/(25xx10^(-6)) = 1.6xx10^(-6) T`
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