E&M D6: Electric Power

FQ:  How do we use current and voltage to calculate electric power?

1.Watch:  Electric Power

Watch this video to review the idea of mechanical power and how we calculate electric power using the formula P = I*V

Electric Power

2. Practice:  Power and Ohm's Law review in-class problems

Earlier, we learned Ohm's Law:

Voltage = Current * Resistance

or

V = I * R

Today, we saw that 

Power = Voltage * Current

or

P = V * I

Power is measured in Watts (W)

Voltage is measured in Volts (V)

Current is measured in Amperes (A) 

3. Practice Quiz

4.  Learn how to use extension cords safely!