In the diagram above, if the internal resistance of the cell is zero, the ration…

Physics JAMB 1999

In the diagram above, if the internal resistance of the cell is zero, the ration of the powers P1 and P2 dissipated by R1 and R2

  • R2/R1 checkmark
  • R1/R2
  • R1+R2/R1
  • R1+R2/R2

The correct answer is: A

Explanation

Power = IV = I2R = V2/R
In terms of e.m.f E, of a cell we have
IE = I2R = E2/R
âˆīP1 = E2/R; P2 = E2/R2/E2/R2
= E2/R1 x R2/E2 = R2/R1
âˆīP1/P2 = R2/R1
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