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Two cells of same emf but different internal resistances r1 and r2 are connected in a series with a resistance R. The value of resistance R, for which the potential difference across second cell is zero, is:
  • a)
    r2 - r1
  • b)
    r1 - r2
  • c)
    r1
  • d)
    r2
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Two cells of same emf but different internal resistances r1 and r2 are...


As per the question,

⇒ R = r2 - r1
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Two cells of same emf but different internal resistances r1 and r2 are connected in a series with a resistance R. The value of resistance R, for which the potential difference across second cell is zero, is:a)r2 - r1b)r1 - r2c)r1d)r2Correct answer is option 'A'. Can you explain this answer?
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