Find the potential diffrence to send the same current, Physics

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A resistor of 8Ω is connected in parallel with one of 12Ω and the combination is connected in series with one of 4Ω.

A p.d. of 10V is applied to the circuit.

The 8Ω resistor is now placed across the 4Ω resistor.

Find the p.d. needed to send the same current through the 8Ω resistor.

 


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