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Electromotive force and potential difference
Explain electromotive force (e.m.f.) as the amount of electrical work performed by a source to move a unit charge around a full circuit.
7
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70
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49
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90 min
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CambridgeIGCSEPhysicsElectricity and magnetism
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Electromotive force and potential difference outcomes7 objectives
- Explain electromotive force (e.m.f.) as the amount of electrical work performed by a source to move a unit charge around a full circuit.
- Understand that electromotive force (e.m.f.) is quantified in volts (V).
- Define potential difference (p.d.) as the work done on a unit charge as it moves through a component.
- Recognize that the potential difference between two points is also measured in volts (V).
- Describe how voltmeters, both analogue and digital, are utilized across various measurement ranges.
- Recall and apply the formula for electromotive force, represented as W = Q, where W is work and Q is charge.
- Recall and apply the formula for potential difference, expressed as W = Q, where W is work and Q is charge.
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