Gce Model Questions Vol1 2023 Computer Studies Question 1
Practice objective / multiple choice question 1 from the 2023 Gce Model Questions Vol1 Computer Studies examination.
An 8‑bit computer system uses a power‑supply unit (PSU) that provides a \(12\,\text{V}\) rail rated at \(20\,\text{A}\) and a \(5\,\text{V}\) rail rated at \(10\,\text{A}\). The CPU consumes \(65\,\text{W}\) and the GPU consumes \(150\,\text{W}\), both drawn from the \(12\,\text{V}\) rail. A hard‑disk drive draws \(10\,\text{W}\) from the \(5\,\text{V}\) rail. The total power drawn from the wall socket, measured by a watt‑meter, is \(350\,\text{W}\). Assuming the remaining current on the \(12\,\text{V}\) rail is used by cooling fans, determine the power consumed by the fans and then calculate the overall efficiency of the PSU, expressed as a percentage (rounded to one decimal place).
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About This Question
This is Gce Model Questions Vol1 2023 Computer Studies Question 1. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Computer Studies examination.
Difficulty level: Medium .
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