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Question 17N.2.SL.TZ0.a.iii

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.2.SL.TZ0.a.iii
Level SL Paper 2 Time zone TZ0
Command term State Question number a.iii Adapted from N/A
a.iii.
[Maximum mark: 1]
17N.2.SL.TZ0.a.iii

Electrical resistors can be made by forming a thin film of carbon on a layer of an insulating material.

A carbon film resistor is made from a film of width 8.0 mm and of thickness 2.0 μm. The diagram shows the direction of charge flow through the resistor.

State why knowledge of quantities such as resistivity is useful to scientists.

[1]

Markscheme

quantities such as resistivity depend on the material

OR

they allow the selection of the correct material

OR

they allow scientists to compare properties of materials

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