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1 March, 09:05

Why emf is measured in open circuit?

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  1. 1 March, 11:25
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    Emf is measured in open circuit because it is the potential difference of a source when no current is flowing.

    Explanation:

    The emf magnitude for any source including battery is the number or value of this open-circuit voltage. Emf cannot be measured in a closed circuit. During charging or discharging of the battery or any source, the emf is not measurable instantly using the external voltage as there is a certain voltage loss inside the source. Emf, according to Faraday is the voltage generated by the force of magnets of the cell.
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