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A current of 2 mA was passed through an ...

A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power when an ideal power supply of 11 V is connected across it is

A

`11 xx 10^(-4)` W

B

`11 xx 10^(5)` W

C

`11 xx 10^(-3)`W

D

`11 xx 10^(-5)` W

Text Solution

Verified by Experts

The correct Answer is:
D
For first case: When V= constant
`P = i^(2)R`
`rArr 4.4 = (2 xx 10^(-3))^(2)R`
`R = 1.1 xx 10^(6) Omega`
For second case: When I = constant
`P = V^(2)/R =(11)^(2)/(1.1 xx 10^(6)) = 11 xx 10^(-5) W`
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