# How much power is produced if a voltage of #7 V# is applied to a circuit with a resistance of #42 Omega#?

##### 2 Answers

Jun 29, 2018

The power is

#### Explanation:

The power is

and Ohm's Law is

Therefore,

The voltage is

The resistance is

Therefore,

The power is

Jun 29, 2018

Approximately

#### Explanation:

Power in here is given by the equation:

where:

#P# is the power in watts

#V# is the voltage in volts

#R# is the resistance in ohms

So, we get: