Questions
In the circuit shown in figure, the galvanometer G shows zero deflection. If the batteries A and B have negligible internal resistance, the value of the resistance of resistor R will be
a
1000 Ω
b
500 Ω
c
100 Ω
d
200 Ω
detailed solution
Correct option is C
Current through R is 12/500+R Voltage across R is 12R500+R Since Galvanometer shows zero deflection. So 12R500+R=2.Talk to our academic expert!
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