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Question 17N.2.SL.TZ0.3b

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Date November 2017 Marks available [Maximum mark: 2] Reference code 17N.2.SL.TZ0.3b
Level SL Paper 2 Time zone TZ0
Command term Deduce Question number b Adapted from N/A
b.
[Maximum mark: 2]
17N.2.SL.TZ0.3b

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

(b)

The current direction is now changed so that charge flows vertically through the film.

Deduce, without calculation, the change in the resistance.

[2]

Markscheme

as area is larger and length is smaller

resistance is «very much» smaller

Award [1 max] for answers that involve a calculation

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