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

A
Decreases
B
Increases
C
Remains the same
D
Any of the above depending upon the relative values of R₁ and R₂

Solution:

Power $\propto \frac{1}{R}$

Since in the second the resistance ( $R_{1}$ + $R_{2}$ ) is higher than that in the first case (R).
Therefore power dissipation in the second case will be decreased

A resistor R₁ dissipates the power P when connected to a certain generator. If the resistor R₂ is put in series with R₁, the power dissipated by $R_{1}$

Solution:

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