Gce Model Questions Vol1 2025 Physics Question 26

Practice objective / multiple choice question 26 from the 2025 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2025 Physics Objective / Multiple Choice Hard Difficulty
Question 26 GCE_MODEL_QUESTIONS_VOL1 • 2025 • PHYSICS • objective

A battery has an emf \(E\) and an internal resistance \(r\). When a load resistor of \(4\ \Omega\) is connected, the current through the circuit is \(3\ \text{A}\) and the terminal voltage is \(12\ \text{V}\). When the load resistance is changed to \(9\ \Omega\), the terminal voltage becomes \(14\ \text{V}\). Determine the emf \(E\) of the battery (in volts) and its internal resistance \(r\) (in ohms).

Answer Options

A. E = 210/12 V ≈ 17.50 V, r = 18/12 Ω ≈ 1.50 Ω
B. E = 220/13 V ≈ 16.92 V, r = 20/13 Ω ≈ 1.54 Ω
Correct Answer C. E = 210/13 V ≈ 16.15 V, r = 18/13 Ω ≈ 1.38 Ω
D. E = 200/13 V ≈ 15.38 V, r = 16/13 Ω ≈ 1.23 Ω
Correct Answer
C
Correct Option:
E = 210/13 V ≈ 16.15 V, r = 18/13 Ω ≈ 1.38 Ω

About This Question

This is Gce Model Questions Vol1 2025 Physics Question 26. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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