Unit 2 - Electricity

Question 1

What is electricity?

Answer 1

The flow of charge such as electrons carrying a source of energy to a component where it is released as another form of energy

Question 2

How do cells/batteries work?

Answer 2

Electrons have a charge, which travels from the cell/battery to other components. The electrons then return to the cell to gain more energy - it is a continuous process

Question 3

What is current?

Answer 3

The rate of flow of charge

Question 4

What is current measured in?

Answer 4

Groups of electrons called coulombs (C)

Question 5

What is potential difference? (voltage)

Answer 5

The measure of how much energy is transferred by each coulomb of charge. They are measured in volts (V). For example, 1 Volt means 1 Joule of energy is given to every coulomb of charge that passes through it

Question 6

How do we measure potential difference?

Answer 6

Using a voltmeter (ALWAYS CONNECTED IN PARALLEL)