Calculate the e.m.f of the cell in the above circuit if its internal resistance is…

Calculate the e.m.f of the cell in the above circuit if its internal resistance is negligible
  • A.
    12 V
  • B.
    8 V
  • C.
    2 V
  • D.
    36 V
Correct Answer: Option B
Explanation

1/R = 1/R1 + 1/R2 = 1/3 + 1/6
= 3/6
∴ R = 6/3 = 2
E = I(R + r) = 4(2 + 0) = 8v

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