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Q.

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as reason (R). 

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An Intiative by Sri Chaitanya

a

Both (A) and (R) are true and (R) is the correct explanation of (A)

b

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

c

(A) is true but (R) is false

d

Both (A) and (R) are false

answer is C.

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Detailed Solution

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Reduction factor of tangent galvanometer:

K=Itanθ=BH×2r0

Thus reduction factor of a tangent galvanometer depends upon the geometry of its coil. It increases with increase of radius and decreases with increase in number of turn of the coil of the galvanometer.  

As, K=Itanθ,

Reduction factor has unit of current.

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