Gce Model Questions Vol1 2023 Physics Question 37

Practice objective / multiple choice question 37 from the 2023 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2023 Physics Objective / Multiple Choice Hard Difficulty
Question 37 GCE_MODEL_QUESTIONS_VOL1 • 2023 • PHYSICS • objective

A battery of unknown emf \(E\) and internal resistance \(r\) supplies a load resistor \(R=4\,\Omega\). When the circuit is connected, the terminal voltage across the load is \(12\,\text{V}\) and the short‑circuit current of the battery (i.e. when \(R=0\)) is measured to be \(6\,\text{A}\).\n(a) Determine the emf \(E\) and the internal resistance \(r\) of the battery.\n(b) If the load is changed to the value that maximises the power delivered to the load, find the new load resistance and the maximum power transferred.

Answer Options

A. E = 20 V, r = 5 Ω, optimal load = 5 Ω, maximum power = 25 W
B. E = 30 V, r = 3 Ω, optimal load = 3 Ω, maximum power = 45 W
C. E = 24 V, r = 6 Ω, optimal load = 6 Ω, maximum power = 24 W
Correct Answer D. E = 24 V, r = 4 Ω, optimal load = 4 Ω, maximum power = 36 W
Correct Answer
D
Correct Option:
E = 24 V, r = 4 Ω, optimal load = 4 Ω, maximum power = 36 W

About This Question

This is Gce Model Questions Vol1 2023 Physics Question 37. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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