Suppose voltage V is applied across a resistance R The power...

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Suppose voltage V is applied across a resistance R. The power dissipated in the resistance is P. Now the same voltage V is applied across a parallel combination of three equal resistors each of resistance R. Then the power dissipated in the second case will be

A. P

B. 3P

C. P/3

D. 2p/ 3

Answer: Option B

Solution (By Examveda Team)

P = I²R where, I = Current, P = Electric Power, R = Resistance. Here all the resistance is put in parallel combination and in parallel combination the value of Resistance decreases and dissipation of power increase, hence 3 times more power will be dissipated(3P).

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