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KVPY2011PhysicsCurrent Electricity

In the following circuit, the 1 resistor dissipates power P . If the resistor is replaced by 9 , the power dissipated in it is

Options

  1. AP
  2. B3 P
  3. C9 P
  4. DP / 3

Correct answer

A. P

Step-by-step solution

10=4 i i = 5 2 P _ i = i ² R = ( 5 2 )² 1= 25 4 P _ f = ( 10 12 )² 9= 100 12 12 9 P _ f = P _ i

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