Unit 4 (part 2) Flashcards
(7 cards)
1
Q
What is power in electricity?
A
How fast electricity is doing work.
2
Q
What is the formula for power?
A
Power = Voltage × Current ( P=VIP = VIP=VI )
3
Q
What is energy in electricity?
A
How much work is done over time — like leaving a light on.
4
Q
What units do we use to measure energy?
A
Joules (J) or kilowatt-hours (kWh)
5
Q
What happens when electricity flows through a wire?
A
It makes a magnetic field!
6
Q
What is an electromagnet?
A
A coil of wire that becomes a magnet when electricity runs through it.
7
Q
How do magnets make electricity?
A
By moving near wires — like in a generator!
