Neco Model Questions Vol1 2025 Physics Question 31

Practice objective / multiple choice question 31 from the 2025 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2025 Physics Objective / Multiple Choice Hard Difficulty
Question 31 NECO_MODEL_QUESTIONS_VOL1 • 2025 • PHYSICS • objective

A battery of unknown emf \(E\) and internal resistance \(r\) supplies a resistor of \(4\ \Omega\). When the resistor is connected, the terminal voltage of the battery is \(12\ \text{V}\) and the current in the circuit is \(2\ \text{A}\). (i) Determine the emf \(E\) and the internal resistance \(r\). (ii) What external resistance should be connected to obtain maximum power transfer, and what is the maximum power delivered to that resistance?

Answer Options

A. r = 1 \Omega, E = 16 V, R_{max} = 1 \Omega, P_{max} = 16 W
Correct Answer B. r = 2 \Omega, E = 16 V, R_{max} = 2 \Omega, P_{max} = 32 W
C. r = 3 \Omega, E = 18 V, R_{max} = 3 \Omega, P_{max} = 27 W
D. r = 2 \Omega, E = 14 V, R_{max} = 2 \Omega, P_{max} = 28 W
Correct Answer
B
Correct Option:
r = 2 \Omega, E = 16 V, R_{max} = 2 \Omega, P_{max} = 32 W

About This Question

This is Neco Model Questions Vol1 2025 Physics Question 31. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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