Neco 2021 Physics Question 33

Practice objective / multiple choice question 33 from the 2021 Neco Physics examination.

Neco 2021 Physics Objective / Multiple Choice Hard Difficulty

Question 33 NECO • 2021 • PHYSICS • objective

A battery of emf \(E\) volts and internal resistance \(r\) ohms is connected to a resistor \(R_1 = 4\ \Omega\) and a current of \(2\ \text{A}\) flows. When the same battery is connected to a different resistor \(R_2 = 9\ \Omega\), the power dissipated in the external resistor is \(12\ \text{W}\). Determine the emf \(E\) (in volts) and the internal resistance \(r\) (in ohms) of the battery. Give your answers to two decimal places.

A. E = 12.00 V; r = 3.00 Ω

Correct Answer B. E = 13.66 V; r = 2.83 Ω

C. E = 13.66 V; r = 3.00 Ω

D. E = 14.50 V; r = 2.50 Ω

Correct Answer

Correct Option:

E = 13.66 V; r = 2.83 Ω

This is Neco 2021 Physics Question 33. It is one of the objective questions from the 2021 Neco Physics examination.

Difficulty level: Hard .

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