1. Demonstrate understanding of current, potential difference, e.m.f. and resistance, and use with their appropriate units.
• Electric Current:
• is the flow of electric charge within a circuit.
• is measured in amperes or amps (A).
• represents how much electric charge is passing a single point in the circuit
• is the same at the beginning and end of a circuit.
• Potential Difference:
• is the difference in the energy there is to drive a current through a wire, between two points
• is measured in volts (v)
• E.M.F:
• electro-motive force (e.m.f) is the voltage (potential) that a battery will supply to the entire circuit
• is the driving force that gives the electrons the energy to move around the circuit.
• Resistance:
• is a measure of how difficult it is to push a current through a circuit.
• is measured in Ohms (Ω)

1. State that charge is measured in coulombs (C).

Charge is measured in coulombs (C).

1. Use and describe the use of an ammeter and a voltmeter.

Ammeter is a device that measures the amount of current flowing through a circuit in amperes (amps).

Voltmeter is a device that measures the potential difference between two points in a circuit.

Notes submitted by Lintha