P3.2.1 - Circuits And Potential Difference Flashcards
1
Q
What do you need to make current flow in a circuit?
A
A potential difference
2
Q
What is the difference between the positive and negative terminal of a battery?
A
The positive terminal is at a higher electrical potential than the negative terminal
3
Q
What is potential difference measured in?
A
Volts (V)
4
Q
What happens when you apply a potential difference between the ends of a wire?
A
An electric field is set up very quickly making the charged electrons start moving
5
Q
How do you measure potential difference?
A
A voltmeter
6
Q
What is electrical working?
A
When a voltmeter measure the work done or energy transferred by the charges in the component
7
Q
What is the equation for energy transferred (in a circuit)?
A
Energy Transferred(J) = Potential Difference(V) X Charge(C)
