Current Electricity and Electrical InstrumentHard
Question
Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R1 and R2 (R2 > R1). If the potential difference across the source having internal resistance R2 is zero, then
Options
A.R = R2 × (R1 + R2)/R2 - R1)
B.R = R2 - R1
C.R = R1R2 /(R1 + R2)
D.R = R1R2 /(R2 - R1)
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