Neco 2019 Physics Question 36

Practice objective / multiple choice question 36 from the 2019 Neco Physics examination.

Neco 2019 Physics Objective / Multiple Choice Hard Difficulty
Question 36 NECO • 2019 • PHYSICS • objective

A battery of emf \(E\) and internal resistance \(r\) is connected to a load resistor. When the load resistance is \(4\,\Omega\) the terminal voltage across the load is \(8\,\text{V}\) and the power dissipated in the load is \(16\,\text{W}.\) When the load resistance is changed to \(9\,\Omega\) the terminal voltage becomes \(6\,\text{V}.\) Determine the emf \(E\) and internal resistance \(r\) of the battery. Then find the value of the load resistance that will deliver maximum power to the load and state the maximum power delivered (give the resistance in \(\Omega\) and the power in \(\text{W}\)).

Answer Options

A. E = 60 V, r = 30 Ω, R_max = 30 Ω, P_max = 20 W
B. E = 48 V, r = 24 Ω, R_max = 24 Ω, P_max = 16 W
Correct Answer C. E = 60 V, r = 36 Ω, R_max = 36 Ω, P_max = 25 W
D. E = 72 V, r = 48 Ω, R_max = 48 Ω, P_max = 36 W
Correct Answer
C
Correct Option:
E = 60 V, r = 36 Ω, R_max = 36 Ω, P_max = 25 W

About This Question

This is Neco 2019 Physics Question 36. It is one of the objective questions from the 2019 Neco Physics examination.

Difficulty level: Hard .

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