Current Electricity and Electrical InstrumentHard
Question
A battery of emf E0 = 12 V is connected across a 4m long uniform wire having resistance 
. The cells of small emfs e1 = 2V and e2 = 4V having internal resistance 2Ω and 6Ω respectively, are connected as shown in the figure. If galvanometer shows no deflection at the point N, the distance of point N from the point A is equal to
. The cells of small emfs e1 = 2V and e2 = 4V having internal resistance 2Ω and 6Ω respectively, are connected as shown in the figure. If galvanometer shows no deflection at the point N, the distance of point N from the point A is equal toOptions
A.
B.
C.25 cm
D.50 cm
Solution
Potential gradient
x =
× 4 = 2Vm-1
Effective emf of E1 and E2
E =
volt
Balancing length AN =
m = 25 cm
x =
× 4 = 2Vm-1Effective emf of E1 and E2
E =
voltBalancing length AN =
m = 25 cmCreate a free account to view solution
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