Question

b) In the circuit diagram shown in the figure, AB is a uniform wire of resistance 10 ohm and length 1 m
.It is connected to a series arrangement of cell E1 of emf 2V and negligible internal resistance and a
resistor R. Terminal A is also connected to an electrochemical cell E2 of emf 100mV and a galvanometer
G. In this set up ,a balance point is obtained at 40 cm mark from A. Calculate R. If E2 were to have an
emf of 300 mV, where will you expect the balance point to be?​

Answer 1

give us diagram..........