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In the circuit shown, a meter bridge is ...

In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance `.1 ohm//cm`. The value of unknown resistance `X` and the current drawn from the battery of negligible resistance is

A

`6Omega, 5` amp

B

`10 Omega, 0.1` amp

C

`4 Omega, 1.0` amp

D

`12 Omega, 0.5` amp

Text Solution

Verified by Experts

The correct Answer is:
C

Resistance of the part AC
`R_(AC) = 0.1 xx 40 = 4 Omega` and `R_(CB) = 0.1 xx 60 = 6 Omega`
Equivalent resistane `R_(eq) = 5 Omega` so current drawn from battery `I = 5/5 = 1 A`
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