6.7 Power and Electrical Energy Flashcards
1
Q
What is power defined as?
A
The rate of transfer of energy
2
Q
What is power measured in?
A
Watts
3
Q
What is 1 watt equivalent to?
A
1 joule per second
4
Q
What is the formula for power in electrical circuits?
A
Power = potential difference x current
5
Q
How can you derive more equations for calculating power? (Without current and without resistance)
A
Without current: power = potential difference^2 / resistance
Without resistance: power = current^2 x resistance
6
Q
How do you calculate energy?
A
Energy = power x time
Substitute power = energy/time into the power equations if needed
