In the network shown, when the terminals of a 10 V cell are connected to A and B, and a galvanometer having coil resistance 100 Ω is connected between C and D, no deflection is registered in the galvanometer. If the same cell is connected between C and D and the same galvanometer is connected between A and B, current flowing through the cell is
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a
179 A
b
2411 A
c
158 A
d
259 A
answer is D.
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Detailed Solution
In the first case, the network must be a balanced wheat stone bridge. ∴R6=24⇒R=3 ΩIn the second case also the circuit is a balanced wheat stone bridge as 23=46∴Re=4+26+34+2+6+3 Ω=185 Ω∴i=1018/5 A=259 A
In the network shown, when the terminals of a 10 V cell are connected to A and B, and a galvanometer having coil resistance 100 Ω is connected between C and D, no deflection is registered in the galvanometer. If the same cell is connected between C and D and the same galvanometer is connected between A and B, current flowing through the cell is