A rectangular coil of a moving coil galvanometer has 50 turns and an area of `12cm^2`. It is suspended in a radial magnetic field of induction `0.025 Wb//m^2`. The torsional constant of the suspension fibre is `1.5 xx10^-9` Nm/degree. The current required to produce the deflection of `5^@` isA. `5muA`B. `2muA`C. `4.5muA`D. `5.5muA`

A rectangular coil of a moving coil galvanometer has 50 turns and an a

1.	A rectangular coil of a moving coil galvanometer has 50 turns and an area of `12cm^2`. It is suspended in a radial magnetic field of induction `0.025 Wb//m^2`. The torsional constant of the suspension fibre is `1.5 xx10^-9` Nm/degree. The current required to produce the deflection of `5^@` isA. `5muA`B. `2muA`C. `4.5muA`D. `5.5muA`
Answer» Correct Answer - A `I=(K)/(n AB)theta= (1.5xx10^-9xx5)/(50xx12xx10^-4xx25xx10^-3)=5mu A ` .

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