Gce Model Questions Vol1 2024 Physics Question 48
Practice objective / multiple choice question 48 from the 2024 Gce Model Questions Vol1 Physics examination.
A 1.0 kg iron block (specific heat \(c=450\,\text{J kg}^{-1}\text{K}^{-1}\)) is heated by a 800 W electric heater. The block loses heat to the surrounding air (temperature \(20^{\circ}\text{C}\)) at a rate proportional to its instantaneous temperature excess, with proportionality constant \(h=5\,\text{W K}^{-1}\). Assuming the block starts at \(20^{\circ}\text{C}\), determine the time required for its temperature to reach \(80^{\circ}\text{C}\).
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About This Question
This is Gce Model Questions Vol1 2024 Physics Question 48. It is one of the objective questions from the 2024 Gce Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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