Question

A 25 A resistor in a circuit has a current flowing through it of 3.0 A. What isthe power dissipated by the resistor? A. 15 WB. 225 WC. 75 WD. 208 W

Answer 1

We are given the following information

Resistance = 25 Ω

Current = 3 A

We are asked to find the power dissipated in the resistor.

Recall that the power dissipated in the resistor is given by

`P=I^2R`

Where I is the current flowing through the resistor and R is the resistance of the resistor.

`\begin{gathered} P=I^2R \\ P=3^2\cdot25 \\ P=9^{}\cdot25 \\ P=225\; W \end{gathered}`

Therefore, the power dissipated by the resistor is 225 W

Option B is the correct answer.