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  • In the shown arrangement of the experiment of a meter bridge if AC corresponding to null deflection of the galvanometer is x, what would be its value if the radius of the wire AB is doubled.?

In the shown arrangement of the experiment of a meter bridge if AC corresponding to null deflection of the galvanometer is x, what would be its value if the radius of the wire AB is doubled.?

Option: 1

x


Option: 2

\frac{x}{4}


Option: 3

4x


Option: 4

2x


Answers (1)

best_answer

At null point \frac{R_1}{R_2}= \frac{R_3}{R_4}= \frac{x}{100-x}

if radius of wire is doubled then the resistance of AC will change and the resistance of CB will also change.

But since \frac{R_1}{R_2} does not change so \frac{R_3}{R_4} should also not change at null point. Therefore point C does not change

Posted by

Deependra Verma

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