Question

If the current through a resistor is 12 A and the voltage drop is 12 V, what is the power absorbed by the resistor? Answer to the nearest 1 W. Assume the power equation is positive.

Answer 1

144 W

Step-by-step explanation:

The power absorbed by a resistor is the product of the current passing through it and the voltage drop across it. Hence

`P=IV`

`P=12\text{ A}*12\text{ V}=144 \text{ W}`

Other variations of this formula are derived using Ohm's law,
`V=IR`

`P=I^2R=(V^2)/(R)`

`R` is the resistance of the resistor. It is what causes the voltage drop.