1
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Question

# A battery of emf. 10 V is connected to resistance as shown in figure. The potential VA - VB difference between the points A and B is___

A
2V
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B
2V
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C
5V
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D
2011V
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Solution

## The correct option is D 2VFirst we'll find the current in circuit from equivalent resistance of circuitIn upper and lower branch 1Ω and 3Ω are in series, their equivalent is 4Ω.Now both 4Ω resistances are in parallel, theirequivalent is 2Ω. 2Ω and 3Ω are in series their equivalent is5Ω. I=105=2Acurrent will be equally divided between both branches, current in each branch will be 22=1Apotential drop across 1Ω is 1×1=1 Vpotential drop across 3Ω is 1×3=3 Vpotential difference between between A and B is 3−1=2 Vhence correct answer is option B.

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