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Power dissipated across the 80 resistor in the circuit shown here is 2 watt. The power dissipated in watt units across the 30 resistor is (a) 1.0 (b) 0.5 (c) 3.0 (d) 2.0



Power dissipated across the 80 resistor in the circuit shown here is 2 watt. The power dissipated in watt units across the 30 resistor is



        (a)    1.0


        (b)    0.5


        (c)    3.0


        (d)    2.0


Grade:upto college level

1 Answers

Aditi Chauhan
askIITians Faculty 396 Points
7 years ago

(c)

Power = V. I = 12R

 

Potential over 80 = Ri2 = 8 ×0.5  = 4V

This is the potential over parallel branch.

So,

        Power of 3W = i1\2R = 1 × 1 × 3 = 3W

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