The area of the coil in a moving coil galvanometer is `15cm^(2)` and has 20 turns. The magnetic induction is `0.2T` and the couple per unit twist of t

Monjur Alahi

The area of the coil in a moving coil galvanometer is `15cm^(2)` and has 20 turns. The magnetic induction is `0.2T` and the couple per unit twist of the suspended wire is `10^(-6) Nm` per degree. If the deflection is `45^(@)`, the current passing through it is
A. `75xx10^(-4)A`
B. `7.5xx10^(-4)A`
C. `0.75xx10^(-4)A`
D. `750xx10^(-4)A`


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Salim Ahmed Kawsar

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Correct Answer - 1
`tau theta=BAIn`

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