A resistor R1 dissipates the power P when connected to a certain generator.If a resistance R2 is put in series with R1 the power dissipated by R1 decreases.Give reasons

Power dissipation,P=V2R1Equivalent Resistance,R=R1+R2Power dissipation,P=V2R            (1)It is clearly shown that the equivalent resistance gets increases so the Power disipation will decrease.

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