How much power is produced if a voltage of 8 V is applied to a circuit with a resistance of 16 Omega?

1 Answer
Feb 13, 2016

Use Ohm's law: V=IR, to obtain the current I. Then use P=I times V to get the power. You will find P=4 Watts.

Explanation:

Use Ohm's law: V=IR, to obtain the current I.

Rearrange to make I the subject:
I = V/R = 8V / 16 Ohms = 0.5 Amps.

Then use P=I times V to get the power.
P=(0.5 Amps) times (8text{ Volts}) = 4 Watts

P=4 Watts.