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Question

A battery of emf 4 volts and internal resistance 1Ω is connected in parallel with another battery of emf 1 volt Combination is used to send current through an external resistance 2Ω. Calculate current through external resistance and potential difference across external resistance.

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Solution


V1=4v
R1=1Ω
V2=1v
R2=0Ω
'Total current from the combination=current flowing 2Ω=I
I=v1v2R1R2=411+0A
=3A
Potential difference across 2Ω=(3×2)v
=6v

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