Electricity Flashcards
1
Q
What is a current?
A
The rate of flow of electric charge - when electrons flow through a good conductor
2
Q
How do you calculate current?
A
Current=charge/time
3
Q
Name two components which provide energy in a circuit`/
A
Motor and battery
4
Q
What is potential difference?
A
Voltage
5
Q
What is resistance?
A
Present in all conductors and acts to limit the current flow
6
Q
How do you measure current?
A
Current=voltage/resistance
7
Q
What is a fuse?
A
Used for cutting off an electrical current when there is an overload
8
Q
When is the resistance of a wire greater?
A
When it is longer or thinner
