P3.2.1 - Circuits And Potential Difference

Question 1

What do you need to make current flow in a circuit?

Answer 1

A potential difference

Question 2

What is the difference between the positive and negative terminal of a battery?

Answer 2

The positive terminal is at a higher electrical potential than the negative terminal

Question 3

What is potential difference measured in?

Answer 3

Volts (V)

Question 4

What happens when you apply a potential difference between the ends of a wire?

Answer 4

An electric field is set up very quickly making the charged electrons start moving

Question 5

How do you measure potential difference?

Answer 5

A voltmeter

Question 6

What is electrical working?

Answer 6

When a voltmeter measure the work done or energy transferred by the charges in the component

Question 7

What is the equation for energy transferred (in a circuit)?

Answer 7

Energy Transferred(J) 
= 
Potential Difference(V)
X 
Charge(C)