Neco 2023 Physics Question 49
Practice objective / multiple choice question 49 from the 2023 Neco Physics examination.
A single‑phase step‑down transformer has 500 primary turns and 125 secondary turns. It is supplied with a sinusoidal rms voltage of \(V_{p}=240\,\text{V}\) at 50\,Hz. Under no‑load the secondary rms voltage is \(V_{s0}=58\,\text{V}\). When a load draws a secondary current of \(I_{s}=2.0\,\text{A}\), the secondary rms voltage falls to \(V_{sL}=55\,\text{V}\). Assuming the voltage drop is due solely to the equivalent series resistance referred to the secondary, calculate (a) the value of this resistance, and (b) the percentage voltage regulation of the transformer.
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About This Question
This is Neco 2023 Physics Question 49. It is one of the objective questions from the 2023 Neco Physics examination.
Difficulty level: Hard .
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