Test Index

BITSAT 2016 Paper

Section: Physics

Question : 27 of 150

Marks: +1, -0

Solution:

At null point

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

If radius of the wire is doubled, then the resistance of AC will change and also the resistance of CB will 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 the point C does not change.

Go to Question:

Prev Question

Next Question