Home » Past Questions » Physics » In the diagram above, if the internal resistance of the cell is zero, the ration...

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


Question

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

Options

A) R2/R1

B) R1/R2

C) R1+R2/R1

D) 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
∴P1 = E2/R; P2 = E2/R2/E2/R2
= E2/R1 x R2/E2 = R2/R1
P1/P2 = R2/R1

More Past Questions:


Dicussion (1)