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Q.

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

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a

decreases

b

increases

c

remains the same

d

any of the above depending upon the relative values of R1, and R2

answer is A.

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Detailed Solution

P=V2R∴ P1=V2R1 and P2=V2R1+R2P2
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A resistor R1 dissipates the power P when connected to a certain generator. If a resistor,R2 is put in series with R1, the power dissipated by R1,