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The student takes measurements for two other components, A and B - Edexcel - GCSE Physics: Combined Science - Question 3 - 2016 - Paper 1
Question 3
The student takes measurements for two other components, A and B. The results for both these components are shown in Figure 4.
Worked Solution & Example Answer:The student takes measurements for two other components, A and B - Edexcel - GCSE Physics: Combined Science - Question 3 - 2016 - Paper 1
Step 1
Component A: Analyze the Graph
Answer
The graph of Component A shows a decreasing trend as temperature increases. The resistance, measured in ohms (Ω), decreases significantly from values around 30,000Ω at low temperatures to roughly 5,000Ω at high temperatures (close to 100°C). This indicates that Component A has a negative temperature coefficient, implying that its resistance decreases with increasing temperature.
Step 2
Component B: Analyze the Graph
Answer
The graph for Component B presents a more complex relationship. Initially, at low temperatures, the resistance begins at around 30,000Ω, similar to Component A. However, as temperature increases, the resistance increases, which illustrates a positive temperature coefficient. This behavior suggests that Component B’s resistance rises with temperature, contrary to Component A.