CAPE Physics Unit 2 · 2009 · Paper 1 · Question Q32

Item 32 refers to the diagram below which shows a photocell, consisting of an anode A and a cathode C inside an evacuated glass tube, connected to an ammeter, voltmeter and a variable d.c. power supply. When the photocell is illuminated with ultra violet light and photoelectrons are emitted corresponding current and voltage values are plotted. Which graph correctly shows the relationship between I and V?

1. (A)[diagram option — open in Quelpr]
2. (B)[diagram option — open in Quelpr]
3. (C)[diagram option — open in Quelpr]
4. (D)[diagram option — open in Quelpr]

This question uses a figure or table from the paper — you'll see it when you practise.