All Problems

Electric Current

Problem 3.175

Two sources of current of equal emf are connected in series and have different internal resistances \(R_{1}\) and \(R_{2} .\left(R_{2}>R_{1}\right)\). Find the external resistance \(R\) at which the potential difference across the terminals of one of the sources (which one in particular?) becomes equal to zero.

Reveal Answer
R=R2−R1,Δφ=0 in the source of current with internal resistanceR2R=R_{2}-R_{1}, \Delta \varphi=0 \text { in the source of current with internal resistance} R_{2}
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