Revision For Electricity and magnetism

Question 1

How is current measured

Answer 1

You measure current with a voltmeter

Question 2

What is potential

difference?

Answer 2

The cell or battery provides push to make charges move. The push is called a potential difference, or p.d for short.
The potential difference across a cell tells you about the size of the force on the charges.
The potential difference also tells you how much energy can be transferred to the components in the circuit by the charges.