Question

Show that for maximum accuracy in the measurement of unknown resistance
by a meter bridge, the null point should be at the mid point of the bridge.​

Answer 1

Answer:

at the null point the accuracy of metre bridge would be maximum because

Explanation:

the current in all the four arms of the metre bridge would be same I.e

P/Q=R/S

and hence the resistance would be low and hence the accuracy would be maximum