What is the potential difference of a supply?
A measure of the amount of charge in a circuit
A measure of the energy given to the charge carriers in a circuit
A measure of the current in a circuit
In an electrical circuit, when do charge carriers gain energy?
Only the first time they pass through the power supply
Every time they pass through the power supply circuit
When they pass through a component in the circuit
What happens when a circuit containing a battery connected to a lamp is switched on?
Charge carriers in the circuit transfer energy to the lamp
The lamp transfers electrical energy to the charge carriers
No energy transfer takes place between the lamp and charge carriers in the circuit
Which of these statements provides the correct definition of voltage?
When one coulomb of charge passes through a component in one second the voltage across the component is one volt.
When one joule of energy is required to move one coulomb of charge through a component the voltage across the component is one volt.
When a current of one ampere moves through a component in one second the voltage across the component is 1 volt.