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# 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 is10Ω,0.1A4Ω,1.0A12Ω,0.5A6Ω,5A

A
10Ω,0.1A
B
6Ω,5A
C
4Ω,1.0A
D
12Ω,0.5A
Solution
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#### Resistance of the part ACRAC=0.1×40=4Ω and RCB=0.1×60=6ΩIn balanced condition X6=46⇒X=4ΩEquivalent resistance Req=5Ω so current drawn from battery i=55=1 A

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