Question

In the meter bridge experiment, balance point was observed at J with AJ=I.
(i) The values of R and X were doubled and then interchanged. What would be the new position of balance point
(ii) If the galvanometer and battery are interchanged at the balance position, how will the balance point get affected?

Answer 1

(i) The value of R and X were doubled and then interchanged. Hence, the new position of balance point will become 100-l.
(ii) From the principle of Wheatstones Bridge. `(R)/(X)=(l)/(100-l)X=R((100-l)/(l))`
Hence the galvonometer and cell are interchanged, the condition for a balance bridge is still satified. Therefore, the galvanometer will not show any deflection.