Question Detail
Question
A battery of emf 6V and internal resistance 3Ω is joined to a resistor of 10Ω. Calculate the terminal potential difference.
Correct Answer
Option C is the correct answer.
Detailed Explanation
Current I = emf/(R+r) = 6/13 ≈ 0.4615A. Terminal p.d. = I×R = 0.4615×10 ≈ 4.6V.
Hint
First find current through the circuit, then multiply by the external resistance.