“electromotive force(symbol: E; unit: volt)”的概念、定义、翻译、参考文献-科学参考

electromotive force(symbol: E; unit: volt)

Electronics and Electrical Engineering

The property of a source of electrical energy that causes a current to flow in a circuit. The algebraic sum of the potential differences in a circuit equals the e.m.f., which is measured by the energy liberated when unit electric charge passes completely round the circuit. A battery of e.m.f. E will supply a current I to an external resistance R:
$E = I (R + r)$
where r is the internal resistance of the battery. The term ‘electromotive force’ strictly applies to a source of electrical energy but is sometimes misused as being equivalent to potential difference.

单词	electromotive force(symbol: E; unit: volt)
释义	electromotive force(symbol: E; unit: volt) Electronics and Electrical Engineering The property of a source of electrical energy that causes a current to flow in a circuit. The algebraic sum of the potential differences in a circuit equals the e.m.f., which is measured by the energy liberated when unit electric charge passes completely round the circuit. A battery of e.m.f. E will supply a current I to an external resistance R: $E = I (R + r)$ where r is the internal resistance of the battery. The term ‘electromotive force’ strictly applies to a source of electrical energy but is sometimes misused as being equivalent to potential difference.
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