In the network shown cell of emf E has internal resistance r and the galvanometer shows zero deflection. If the cell is replaced by a new cell of emf 2E and internal resistance 3r keeping everything else identical then

Question

TestHub · Accepted Answer

In given circuit diagram, galvanometer shows zero deflection, hence it is a Wheatstone balanced circuit.
Hence, $V_{A} = V_{B}$
On replacing a new cell of emf 2E and internal resistance 3r, no effect occurs on balanced condition of bridge, i.e., $V_{A} = V_{B}$ .
Hence, the galvanometer will shows zero deflection.

Physics - Current Electricity Question with Solution | TestHub

Options:

Doubts & Discussion