Neco 2022 Physics Question 31
Practice objective / multiple choice question 31 from the 2022 Neco Physics examination.
A battery of unknown emf \(E\) and internal resistance \(r\) is connected to a load resistor. When the load resistance is \(6\ \Omega\) the terminal voltage is \(12\ \text{V}\) and the total power supplied by the battery is \(30\ \text{W}\). The battery is then reconnected to a different load such that the efficiency (ratio of power delivered to the load to total power supplied) is \(60\%\). Determine the value of the new load resistance (in \(\Omega\)).
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About This Question
This is Neco 2022 Physics Question 31. It is one of the objective questions from the 2022 Neco Physics examination.
Difficulty level: Hard .
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