Question

When a metal conductor connected to the left gap of a meter bridge is heated, the balancing point

• A. shifts towards right
• B. shifts towards left
• C. remains unchanged
• D. remains at zero

Answer 1

Answer: (A)

shifts towards right

Answer 2

As the resistance of metal increases on increasing the temperature,
so resistance of metal conductor in left arm will increase on heating.
For meter bridge $\frac{R_{1}}{R_{2}}=\frac{l}{100-l}$
As $R_{1}$ increases $I$ also increases.
Hence, balancing point shifts towards right.