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The radius of the coil of a Tangent galv...

The radius of the coil of a Tangent galvanometer, which has 10 turns, is 0.1 m. The current required to produce a deflection of `60^(@) (B_(H)=4xx10^(-5)T)` is

A

`3A`

B

`1.1A`

C

`2.1A`

D

`1.5A`

Text Solution

Verified by Experts

The correct Answer is:
B
`B=B_(H) tanthetaimplies(mu_(0)ni)/(2r)=B_(H) tantheta`
`implies i=(2r. B_(H) tantheta)/(mu_(0)n)=(2xx0.1xx4xx10^(-5))/(10xx4pixx10^(-7))=1.1 A`
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