In the diagram above, if the internal resistance of the cell...
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
A.
R2/R1
B.
R1/R2
C.
R1+R2/R1
D.
R1+R2/R2
Correct answer is A
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
Similar Questions
Which of the following devices does not makes use of eddy current for its action? A/An ...
Under which of the following conditions do gases conduct electricity? ...
I. Mass II. Density III. Temperature IV. Nature of substance which of the above affect diffusion...
Which is NOT one of the laws of solid friction? ...
A circuit has a resistance of 200Ω. The resistance of the circuit can be reduced to 120Ω when ...
Which of the following is not true of the similarities between a camera and the human eye? ...