Assertion :Increasing the current sensitivity of a galvanometer necessarily increases the voltage sensitivity. Reason: Voltage sensitivity is inversely proportional to current sensitivity.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
Current sensitivity is defined as the number of deflections per unit current. It is given by:
$I_{s} = \frac{θ}{I}$

Whereas the voltage sensitivity is given as:
$V_{s} = \frac{θ R}{V}$

The voltage sensitivity does not get affected due to any change in the current sensitivity.

Therefore, assertion and reason both are incorrect.

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