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Q.

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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a

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

b

A is true but the R is false

c

Both A and R are false

d

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

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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