Concept explainers
An electric heater is tested by immersing it in 0.500 kg of water and measuring the time Δt it takes to raise the water temperature by 10.0°C. The experiment is repeated for different currents I through the heater, and the results are tabulated below. Determine two quantities, based on heating time and current, which, when plotted, will give a straight line. Make your plot, determine a best-fit line, and use it to find the heater's resistance. Hint: You may need to consult Chapter 16.
I(A) | 2.00 | 4.00 | 6.00 | 8.00 | 10.00 |
Δt(s) | 422 | 112 | 44.3 | 28.2 | 16.9 |
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