Physics A-Level
Electromotive Force (e.m.f.)
What Electromotive Force (e.m.f.) means in Physics A-Level, as defined for Pearson Edexcel.
Definitions of Electromotive Force (e.m.f.)
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
The electrical energy transferred by a power supply per unit charge passing through it.
The electrical energy transferred by a power supply per unit charge.
Topics that use Electromotive Force (e.m.f.)
- Electric Circuits (Pearson Edexcel A-Level)
- Materials (Pearson Edexcel A-Level)
- Mechanics (Pearson Edexcel A-Level)
Related terms
- Potential Difference
- Resistivity
- Ohmic Conductor
- Internal Resistance
- Ohm's Law
- Resistance
- Conventional Current
Using Electromotive Force (e.m.f.) in the exam
Definition questions usually carry one or two marks, and examiners look for the precise wording. Write the definition from memory, check it against the version above, and then use the term in a longer answer on the same topic so it sticks.
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