11 (a) (i)
Use the graph to help predict the current in mA for a distance of 30 cm. The first two results in the table have been plotted for you. 200 current in mA
180 160 140 120 100 80 60 40 20 0
0
10
20
30 40 50 distance in cm
Current for a distance of 30 cm = .............. mA (ii)
[2]
Write a detailed conclusion about the relationship between the current and the distance between the torch and the photocell. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [2]
(iii)
Explain why this trend happens. ........................................................................................................................................... ...................................................................................................................................... [1]
Š OCR 2013
Turn over for the remainder of question 6