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Galvanometer

The plane of ...

Question

The plane of the coil of tangent galvanometer is parallel to the magnetic meridian

A

to avoid the influence of earths magnetic field.

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B

to increase the magnetic field due to the current in the coil.

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C

to make earths magnetic field perpendicular to that due to the current in the coil.

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D

for some other reason.

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Solution

The correct option is B to make earths magnetic field perpendicular to that due to the current in the coil.
Principal of working of tangent galvanometer,ensures no interception of field of coil with horizontal component of earth's magnetic field

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