A) 0.7 amp
B) 1.2 amp
C) 1.5 amp
D) 1.0 amp
Correct Answer: D
Solution :
As the given condition is of balanced wheat stone bridge. \[\therefore \] \[{{l}_{1}}\times 12=(1.4-{{l}_{1}})\times 30\]. \[\Rightarrow \] \[{{l}_{1}}\times 42=1.4\times 30\] \[\Rightarrow \] \[1.4\times \frac{30}{40}=1\,\,A\].
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