Question

All resistors in the circuit have the same resistance, $R$, and the battery is having a constant voltage of $V$.
Find out power dissipated by resistor $f$. Given that the power dissipated by resistor $e$ is $P$:

• A. $\frac{P}{6}$
• B. $\frac{P}{3}$
• C. $\frac{P}{2}$
• D. $P$
• E. $2P$

Answer 1

Answer: (D)

The power dissipated by a resistor is $i^{2}R$

where $i$ is the current through the resistor of resistance $R$.

Since both $i$ and $R$ for the resistors $e$ and $f$ are equal (they are of equal resistance and connected in series), the power dissipated by both of them is the same and equal to $P.$