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PHYSICS

JAMB 2023 - Question 16

Physics 2023 JAMB Past Questions - Question 16: An electric cell has an internal resistance of 2 ohms.A current of 0.5A is found to flow when a resistor of 5ohms resistance is connected across it What is the electromotive force of the cell?

An electric cell has an internal resistance of 2 ohms.
A current of 0.5A is found to flow when a resistor of 5ohms resistance is connected across it What is the electromotive force of the cell?

A: 5 volts

B: 15 volts

C: 2.5 volts

D: 1 volt.

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Correct Answer

Explanation

E.m.f. = I(R + r) = 0.5(2+5) = 3.5 volts