A battery of emf 24V and internal resistance 4Ω is connected to a resistor of 32Ω. What is the terminal p.d of the battery?

A battery of emf 24V and internal resistance 4Ω is connected to a resistor of 32Ω. What is the terminal p.d of the battery?

A 24.0V
B 21.3V
C 16.0V
D 2.7V
E 2.0V

waec 1988 physics

The correct answer is B. 21.3V

E = V + Ir

V = E- Ir

V = 24 - {(24/36) x 4}

V = 21.3V

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