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EMF and EMF Devices

The potential...

Question

The potential differnce $(V_{A} - V_{B})$ between the points $A$ and $B$ in the given figure is

9 V

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6 V

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3 V

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4 V

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Solution

The correct option is A $9 V$
$V_{A} - I \times R_{1} - V - I \times R_{2} = V_{B}$
$\Rightarrow V_{A} - 2 \times 2 - 3 - 2 \times 1 = V_{B}$
$\Rightarrow V_{A} - V_{B} = 9 V$

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