Question

three equal resistor in series across a source dissipate 10 watts of power . what will be the power dissipated in watts if the same resistor are connected in parallel.​

Answer 1

Answer:

Explanation:

When the three resistors are in series, effective resistance in the circuit = 3R. Power dissipated in the series circuit = Pseries = V2/(3R) = 10 W ⇒ V2/(R) = 30 W When the three resistors are in parallel, effective resistance in the circuit = R/3. Power dissipated in the parallel circuit = Pparallel = V2/(R/3) = 3V2/(R) = 3 x 30 W = 90 W.