The figure shows a meter bridge wire AC having uniform are

Last updated: 6/9/2023

The figure shows a meter bridge wire AC having uniform are of cross section X is a standard resistance of 40 and Yis a resistance coil When Yis immersed in melting ice the null point is at 40 cm from point A When the coil Yis heated to 100 C a resistance of 100 Q has to be connected in parallel with Y in order to keep the bridge balanced at the same point The temperature coefficient of resistance of coil is X 40 Y A 5 x 10 C 2 3 10 4 C 6 3 10 4 C 3 x 10 4 C B D G C