Three equal resistors connected in series across a source of V voltage together dissipates 5W power. If the same resistors are connected in parallel across the same source of voltage V, the power dissipated will be :
(A) 20 W (B) 25 W (C) 40 W (D) 45 W
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Answer is
(D) 45
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Answer: ASSUME RESISTOR - 1 OHM THEN IN SERIES V=IR THEN I =V/3--OHM IN SERIES THE P=VI ------------5=V/3*V----------V^2= 15 in parallel eq resistance is 1/3 ohm so I=V/R------------I =3V ------------------------P=VI=======V^2*3------------V^2=15 SO P =15*3 = 45 W IS THE ANSWER PLEASE MARK AS BRAINLIST
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