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Question 18M.2.HL.TZ1.c.i

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

Hydrogen atoms in an ultraviolet (UV) lamp make transitions from the first excited state to the ground state. Photons are emitted and are incident on a photoelectric surface as shown.

M18/4/PHYSI/HP2/ENG/TZ1/08

The electric potential of the photoelectric surface is 0 V. The variable voltage is adjusted so that the collecting plate is at –1.2 V.

On the diagram, draw and label the equipotential lines at –0.4 V and –0.8 V.

[2]

Markscheme

two equally spaced vertical lines (judge by eye) at approximately 1/3 and 2/3

labelled correctly

M18/4/PHYSI/HP2/ENG/TZ1/08.c.i/M

[2 marks]

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