MHT CET2019Morning ShiftPhysicsCurrent ElectricityActual
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
Options
- AThe galvanometer will show deflection of 10 divisions.
- BThe galvanometer show zero deflection,
- CCurrent will flow from B to A.
- DCurrent will flow from A to B.
Correct answer
B. The galvanometer show zero deflection,
Step-by-step solution
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.