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

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.
$P = \left(0.5 A m p s\right) \times \left(8 \textrm{V o < s}\right) = 4$ Watts

P=4 Watts.