Current Electricity 3 Question 6

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

(a) 11×104W

(b) 11×105W

(c) 11×105W

(d) 11×103W

(2019 Main, 10 Jan II)

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Solution:

  1. Power dissipated by any resistor R, when I current flows through it is,

P=I2R

Given I=2mA=2×103A and P=4.4W

Using Eq. (i), we get

or

$$



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