A) 1.5V
B) 1.0 V
C) 0.5 V
D) 3.2 V
Correct Answer: D
Solution :
Key Idea: In parallel resistances, potential difference across them is same. Potential difference across PM \[V=4\times 1=4\] volt (ie, across \[4\,\Omega \]) Equivalent resistance of lower side arm, \[{{\operatorname{R}}_{eq}}=1+\frac{0.5\times 0.5}{0.5+0.5}=1.25\Omega \] Now the circuit can be shown as Let current I flows in lower branch, so \[1.25I=4V\]or\[I=\frac{4}{1.25}=3.2A\] Therefore, 3.2 A current flows in \[1\Omega \] resistance, hence potential difference between M and N is \[V'=3.2\times 1=3.2\] voltYou need to login to perform this action.
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