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___________ is the device used to measure the emf of the cell.

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___________ is the device used to measure the emf of the cell.

(a) Voltmeter

(b) Potentiometer

(c) Ammeter

(d) Multimeter

This question was posed to me in an online interview.

This intriguing question comes from Types of Fuel Cells topic in chapter Electro Chemical Cells and Corrosion of Applied Chemistry

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The correct option is (b) Potentiometer

Explanation: The potentiometer is the device used to measure the electro motive force of the cell. Ammeter is used to measure the quantity of current.

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