Neco 2023 Physics Question 42

Practice objective / multiple choice question 42 from the 2023 Neco Physics examination.

Neco 2023 Physics Objective / Multiple Choice Hard Difficulty
Question 42 NECO • 2023 • PHYSICS • objective

An ideal battery of emf \\(12\text{ V}\\) has an internal resistance \(r\) \(\Omega\). When a load resistor \(R = 6\,\\Omega\) is connected, the power dissipated in the load is \(8\text{ W}\). The load is then changed to a value that gives maximum power transfer to the load. Determine the internal resistance \(r\) (in \(\Omega\)) and the maximum power delivered to the load (in watts, to two decimal places).

Answer Options

Correct Answer A. r \approx 4.39 \Omega, P_{max} \approx 8.20 W
B. r \\approx 3.00 \\Omega, P_{max} \\approx 7.50 W
C. r \\approx 6.00 \\Omega, P_{max} \\approx 6.00 W
D. r \\approx 4.39 \\Omega, P_{max} \\approx 9.00 W
Correct Answer
A
Correct Option:
r \approx 4.39 \Omega, P_{max} \approx 8.20 W

About This Question

This is Neco 2023 Physics Question 42. It is one of the objective questions from the 2023 Neco Physics examination.

Difficulty level: Hard .

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