Question 1
Three resistors were tested in a circuit and the current–voltage characteristics were recorded. Which resistor demonstrates ohmic behaviour over the entire voltage range shown?
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Physics · Unit 1 · Electrical circuits · Current, potential difference and energy flow
Discuss the differences between ohmic and non-ohmic resistors.
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Question 2
A student measures the current through two different resistors, P and Q, at various potential differences. The results are plotted on the graph shown. What key feature differentiates the behaviour of resistor P from resistor Q?
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Question 3
Which statement best describes the difference between the behaviour of Resistor X and Resistor Y shown in the graph?
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