In the given figure of meter bridge experiment, the balancing length $A C$ corresponding to null deflection of the galvanometer is $40 cm$ . The balancing length, if the radius of the wire $A B$ is doubled, will be _____ $cm$ .

Question

TestHub · Accepted Answer

Even if the radius of wire is doubled, the balancing point would not change as x l - x = R 1 R 2 , which is independent of area in case of uniform wire. Thus, the balancing length remains the same i.e., 40 cm .

Physics - Current Electricity Question with Solution | TestHub

Doubts & Discussion