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Question 18M.3.SL.TZ1.b.i

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.SL.TZ1.b.i
Level SL Paper 3 Time zone TZ1
Command term Discuss Question number b.i Adapted from N/A
b.i.
[Maximum mark: 2]
18M.3.SL.TZ1.b.i

The diagram shows the motion of the electrons in a metal wire carrying an electric current as seen by an observer X at rest with respect to the wire. The distance between adjacent positive charges is d.

M18/4/PHYSI/SP3/ENG/TZ1/03

Observer Y is at rest with respect to the electrons.

Discuss the change in d according to observer Y.

[2]

Markscheme

«according to Y» the positive charges are moving «to the right»

d decreases

 

For MP1, movement of positive charges must be mentioned explicitly.

[2 marks]

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