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A student investigates the heating of a metal cylinder, Y, using a constant-power electrical heater.

A graph showing how the temperature of metal cylinder Y changes over time. The x-axis is labeled 'Time in minutes' and ranges from 0 to 30. The y-axis is labeled 'Temperature in °C' and ranges from 0 to 100. The curve starts at 20 °C, rises steeply at first, then the curve's gradient gradually decreases until it becomes a completely horizontal line at 78 °C.

Explain why the temperature of cylinder Y eventually reaches a constant value, even though the heater remains switched on.

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Thermal radiation and energy balance Questions

Practise Edexcel GCSE Physics Thermal radiation and energy balance with exam-style questions for Foundation and Higher tier. 46 questions, matched to the Edexcel GCSE Physics (1PH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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Thermal radiation and energy balance Questions

  1. GCSE
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  3. /Thermal radiation and energy balance