A : - Earth’s magnetic field does not affect the working of a moving coil galvanometer
R: - The earth’s magnetic field is quite weak as compared to magnetic field produced in the moving coil galvanometer

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Both A and R are true and the R is a correct explanation of the A

Both A and R are true but R is not a correct explanation of the A

A is true but the R is false

Both A and R are false

answer is A.

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Detailed Solution

In Moving coil galvanometer the coil is kept inside a strong field produced by a semicircular magnet to produce radial magnetic field.

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