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Question

In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance 0.1 ohm/cm. The value of unknown resistance X and the current drawn from the battery of negligible resistance is
1039636_1cbdd47b003c4f80a72d5cd500b0cbcf.png
  1. 10Ω,0.1A
  2. 4Ω,1.0A
  3. 12Ω,0.5A
  4. 6Ω,5A

A
10Ω,0.1A
B
6Ω,5A
C
4Ω,1.0A
D
12Ω,0.5A
Solution
Verified by Toppr

Resistance of the part AC
RAC=0.1×40=4Ω and RCB=0.1×60=6Ω
In balanced condition X6=46X=4Ω
Equivalent resistance Req=5Ω so current drawn from battery i=55=1 A

1734995_1039636_ans_61bdb2d316044235a0e4d438985b81f5.png

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