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Question

Potential difference between the points P and Q in the electric circuit shown is

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A
4.5 V
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B
1.2 V
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C
2.4 V
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D
2.88 V
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Solution

The correct option is D 2.88 V
In the given circuit, current flowing through 3 ohm resistor is parallel to the resistances in either sides of branch PQ.

Hence, equivalent resistance Req, is

1Req=18+13+116

1Req=13+316

Req=16×325

VPVQ=iReq=1.5×16×325=2.88volt.

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