Question

When the bridge is balanced, what is the current flowing through the galvanometer?

(a) 0

(b) depends on the ratio arms R1 and R2

(c) varies by a factor of 2

(d) depends on the type of null detector used

This question was addressed to me in my homework.

This question is from Sensitivity of Wheatstone Bridge in portion Measurement of Resistance of Electrical Measurements

Answer 1

The correct option is (a) 0

The explanation: Under bridge balance condition, no current flows through the galvanometer. Current flow is independent of the values of ratio arms R1 and R2.