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Q.

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
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