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Q.

Which of the following statements is not true?

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a

While taking reading of tangent galvanometer, the plane of the coil must be set at right angles to the earth's magnetic meridian.

b

A short magnet is used in a tangent galvanometer since a long magnet would be heavy and may not easily move.

c

Measurements with the tangent galvanometer will be more accurate when the deflection is around 45o.

d

A tangent galvanometer cannot be used in the polar region.

answer is A.

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Detailed Solution

In tangent galvanometer experiment, the plane of the coil is firstly set in the magnetic meridian.
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