Neco 2017 Physics Question 6

Practice objective / multiple choice question 6 from the 2017 Neco Physics examination.

Neco 2017 Physics Objective / Multiple Choice Hard Difficulty
Question 6 NECO • 2017 • PHYSICS • objective

A battery with internal resistance \(r\) is connected in series with a resistor \(R_{1}=4\,\Omega\). This series combination is then connected across a parallel network consisting of a resistor \(R_{2}=6\,\Omega\) and an unknown resistor \(R_{3}\). The total current drawn from the battery is \(3\,\text{A}\), the power dissipated in \(R_{2}\) is \(9\,\text{W}\), and the total electrical power supplied by the battery is \(60\,\text{W}\). Determine the value of the internal resistance \(r\) (in \(\Omega\)) and the resistance \(R_{3}\) (in \(\Omega\)).

Answer Options

A. r \\approx 0.40\\,\\Omega, \\; R_{3} \\approx 2.80\\,\\Omega
B. r \\approx 0.30\\,\\Omega, \\; R_{3} \\approx 5.00\\,\\Omega
C. r \\approx 0.15\\,\\Omega, \\; R_{3} \\approx 3.50\\,\\Omega
Correct Answer D. r \approx 0.22\,\Omega, \; R_{3} \approx 4.14\,\Omega
Correct Answer
D
Correct Option:
r \approx 0.22\,\Omega, \; R_{3} \approx 4.14\,\Omega

About This Question

This is Neco 2017 Physics Question 6. It is one of the objective questions from the 2017 Neco Physics examination.

Difficulty level: Hard .

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