AQA GCSE Physics Electricity Definitions Quiz

What is the unit of current?

• Coulomb

• Ampere

• Ohm

• Volt

What does the term "Alternating Potential Difference" refer to?

• A one-directional current flow

• A force pulling two opposite charges together

• A potential difference oscillating between a positive and negative value

• The rate of flow of electrical charge

What is the purpose of an Earth Wire in electrical appliances?

• To allow current to flow in one direction only

• To prevent an appliance from becoming live

• To emit light when heated

• To represent an electric field

What is the definition of "Electrical Work"?

• The unit of charge

• The unit of current

• When charge flows in a circuit, electrical work is said to be done

• A light emitting component

Which component is described as having a resistance that increases as the filament's temperature increases?

• Diode

• Earth Wire

• Filament Lamp

• Electric Field Lines

What is the purpose of insulation in power cables?

• To prevent the cables from overheating

• To prevent electrocution and allow for easy identification

• To increase the flow of electricity

• To decrease the resistance in the cables

What happens to the resistance of a Light Dependent Resistor (LDR) as light intensity decreases?

• It stays the same

• It decreases

• It increases

• It becomes zero

What color is the live wire in a mains power supply?

• Red

• Green

• Brown

• Blue

What is the frequency value of mains electricity in the UK?

• 120V

• 50Hz

• 60Hz

• 230V

What color is the neutral wire in a mains power supply?

• Red

• Green

• Brown

• Blue