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A current of 0.8 A through a Tangent Gal...

A current of 0.8 A through a Tangent Galvanometer produces a true deflection of `45^@`. The Coil is turned through `90^@` and a current 0.4 A is passed through it. Deflection produced is

A

`60^@`

B

`30^@`

C

`45^@`

D

zero.

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