- 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)
- 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.
- is a measure of how difficult it is to push a current through a circuit.
- is measured in Ohms (Ω)
- State that charge is measured in coulombs (C).
Charge is measured in coulombs (C).
- 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
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