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Question 19N.3.SL.TZ0.b

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.3.SL.TZ0.b
Level SL Paper 3 Time zone TZ0
Command term Draw Question number b Adapted from N/A
b.
[Maximum mark: 2]
19N.3.SL.TZ0.b

The resistance R of a wire of length L can be measured using the circuit shown.

In one experiment the wire has a uniform diameter of d = 0.500 mm. The graph shows data obtained for the variation of R with L.

The gradient of the line of best fit is 6.30 Ω m–1.

The experiment is repeated using a wire made of the same material but of a larger diameter than the wire in part (a). On the axes in part (a), draw the graph for this second experiment.

[2]

Markscheme

ANY straight line going through the origin if extrapolated ✔
ANY straight line below existing line with smaller gradient ✔

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