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Two cells of e.m.f 1.25 Volt and 0.75 Volt and each of internal resistance 1 ohm are connected in parallel. The effective voltage will be

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let e1=1.25 and e2 =0.75

The effective voltage=(e1r+e2r)/r+r=(e1+e2)/2=1 Volt

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Safeer PP

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