A cell of e.m.f. 1.5V is connected in series with a resistor of resistance 3.0Ω. A voltmeter connected across the cell registers 0.9V. Calculate the internal resistance of the cell?

by | May 19 | Physics WAEC | 0 comments

A. 2.0Ω.
B. 3.0Ω.
C. 5.0Ω.
D. 6.0Ω.

Correct Answer: Option A

Explanation

V/R=E/(R+r)

0.93=1.5/3+r

r = 2Ω.

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