Page 762 - SUBSEC October 2017_Neat

-6- 02238032/SPEC/K/MS/JUNE 2017

PHYSICS
UNIT 2 — PAPER 032
MARK SCHEME

Question 3 continued

KC UK XS
(c) Procedure

(1) For Voltage/Intensity:

With no colour filters (or same colour filter) present (1)
vary the distance of lamp (d) from photocell OR change vary
lamp intensity for at least three positions (1).

Measure and record voltage (1)
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5
(2) For Voltage/Colour:

With distance (d) fixed (1), measure and record the voltage
for at least 3 different colours (1)
[5 marks]

(d) Results and Conclusion

Intensity Voltage/V Conclusion

V1
1 low V depends on Intensity if V 1 ≠ V 2 ≠ V 3 (1)
medium V2 Inverse/proportional relationship (1)

high V3 V independent intensity if V1 = V2 = V3
(1) 5

2 Colour 1 V 1 V depends on colour if V1 ≠ V2 ≠ V3 (1)

Colour 2 V 2 V independent colour if V1 = V2 = V3 (1)

Colour 3 V 3

Total 15 marks 15