Neco 2024 Computer Studies Question 11

Practice objective / multiple choice question 11 from the 2024 Neco Computer Studies examination.

Neco 2024 Computer Studies Objective / Multiple Choice Medium Difficulty
Question 11 NECO • 2024 • COMPUTER_STUDIES • objective

A computer system uses the following components: CPU 95 W, GPU 150 W, hard‑disk 10 W, solid‑state drive 5 W, four fans each consuming 3 W, and a motherboard that uses 30 W. The power‑supply unit (PSU) is rated at 500 W. Its efficiency varies linearly with load: at \(20\%\) load the efficiency is 92\%, and at \(100\%\) load the efficiency is 78\%. Assuming the system draws a total load of 380 W, determine (a) the efficiency of the PSU at this load, (b) the total power that must be drawn from the mains, and (c) the amount of power dissipated as heat in the PSU. Give your answers to the nearest watt.

Answer Options

A. Efficiency ≈ 78 %; Input power ≈ 487 W; Heat dissipated ≈ 107 W
Correct Answer B. Efficiency ≈ 82 %; Input power ≈ 463 W; Heat dissipated ≈ 83 W
C. Efficiency ≈ 80 %; Input power ≈ 475 W; Heat dissipated ≈ 95 W
D. Efficiency ≈ 84 %; Input power ≈ 452 W; Heat dissipated ≈ 72 W
Correct Answer
B
Correct Option:
Efficiency ≈ 82 %; Input power ≈ 463 W; Heat dissipated ≈ 83 W

About This Question

This is Neco 2024 Computer Studies Question 11. It is one of the objective questions from the 2024 Neco Computer Studies examination.

Difficulty level: Medium .

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