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A designer is going to use a thermistor in a temperature gauge - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1
Question 3
A designer is going to use a thermistor in a temperature gauge. He connects the thermistor into this circuit. He heats the thermistor and measures the current at di... show full transcript
Worked Solution & Example Answer:A designer is going to use a thermistor in a temperature gauge - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1
Step 1
Plot this value on the graph.
Answer
To plot the point for the current of 0.138 A at a temperature of 47 °C, locate 47 °C on the x-axis of the graph. Then find the corresponding value on the y-axis for a current of 0.138 A. Place a small square or a clearly marked point at the intersection of these coordinates on the graph.
Step 2
Draw the curve of best fit through the points.
Answer
To draw the curve of best fit, smoothly connect the plotted points on the graph, ensuring that the line passes through most of the points while capturing the overall trend of current increasing as temperature increases. Avoid excessive curving or dot-to-dot connections.