Electricity Flashcards
1
Q
What is electric current?
A
A flow of electrical charge.
2
Q
What is electrical charge?
A
Electrical charge will only flow round a complete (closed) circuit if there is a source of potential difference.
3
Q
Unit of current:
A
Ampere, amps, A
4
Q
In a single, closed loop…
A
The current has the same value everywhere in the circuit.
5
Q
What is potential difference?
A
(Or voltage) is the driving force that pushes the charge round. It’s unit is the volt, V
6
Q
What is resistance?
A
Anything that slows the flow down. Unit: Ohm.
7
Q
The current flowing through a component…
A
Depends on the potential difference across it and the resistance of the component.
