WAEC Physics 2013 Objective — Question 39
Question 39 of 50 from the West African Examinations Council (WAEC) Physics 2013 Objective paper, with the correct answer and a full explanation.
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Which of the following instruments is used to determine the accurate value of the electromotive force of a cell?
- A. Voltmeter
- B. Meter bridge
- C. Ammeter
- D. PotentiometerCorrect
Explanation
A potentiometer is used to determine the accurate (true) emf of a cell, since at balance it draws no current from the cell.
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