| 
 Electromotive Force 
 | 
 Potential Difference 
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| Similarities: Have same unit (Volt) Can be measured by Voltmeter  | 
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| Definition The electromotive force (e.m.f.) is defined as the energy per unit charge that is converted from chemical, mechanical, or other forms of energy into electrical energy in a battery or dynamo.  | 
Definition The potential difference (p.d.) between two points is defined as the energy converted from electrical to other forms when one coulomb of positive charge passes between the two points.  | 
| Symbol: Denote by the symbol, E.  | 
Symbol: Denote by the symbol, V  | 
