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Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R1 and R2 (R1 > R1). If the potential difference across the source having internal resistance R2 is zero, then
  • a)
    R = R2 - R1
  • b)
    R = R2 x (R1 + R2) /(R2 - R1)
  • c)
    R = R1R2 /(R2 - R1)
  • d)
    R = R1R2 /(R1 - R2)
Correct answer is option 'A'. Can you explain this answer?
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Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R1 and R2 (R1 > R1). If the potential difference across the source having internal resistance R2 is zero, thena)R = R2 - R1b)R = R2 x (R1 + R2) /(R2 - R1)c)R = R1R2 /(R2 - R1)d)R = R1R2 /(R1 - R2)Correct answer is option 'A'. Can you explain this answer?
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