# march 08 p1a

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Surname Initial(s)
Signature
Paper Reference(s)
5009 5045
Edexcel GCSE
Science (5009)
Physics (5045)
P1a ­ Topics 9 and 10
Foundation and Higher Tier
Monday 10 March 2008 ­ Morning
Time: 20 minutes
Materials required for examination Items included with question papers
HB pencil, eraser and calculator
Instructions to Candidates
Use an HB pencil. Do not open this booklet until you are told to do so.
Foundation tier candidates: answer questions 1 ­ 24.
Higher tier candidates: answer questions 17 ­ 40.
All candidates are to answer questions 17 ­ 24.
Before the test begins:
Check that the answer sheet is for the correct test and that it contains your candidate details.
For each question, choose the right answer, A, B, C or D
and mark it in HB pencil on the answer sheet. A B D
For example, the answer C would be marked as shown.
Do any necessary calculations and rough work in this booklet. You may use a calculator if you wish.
You must not take this booklet or the answer sheet out of the examination room.
Printer's Log. No.
H32989A Turn over
*H32989A*
W850/R1535/57570 6/5/2/2/1
This publication may be reproduced only in accordance with Edexcel Limited copyright policy. ©2008 Edexcel Limited.

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Questions 1 to 16 must be answered by Foundation tier candidates only.
Higher tier candidates start at question 17.
Generating electricity
Joe bought a wind up torch.
If Joe winds the torch for 1 minute it will give 30 minutes of power.
1. The electric current to charge the torch is produced by
A dry batteries
B an electric motor
C a voltmeter
D a dynamo

### Page 3

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The graph shows a current.
current
in amps
0
time in
seconds
This type of current is
A direct current
B indirect current
C alternating current
D transverse current

### Page 4

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Rechargeable batteries
Use this information to answer questions 6 to 10.
Peter is choosing a new 1.2 V rechargeable battery for his digital camera.
Peter uses the internet to find information about rechargeable batteries.
The table shows this information.
voltage capacity cost per battery
brand
(volts) (milliamp-hours) (pence)
Lightning 1.2 700 100
Allbright 1.2 3000 300
Energator 6.0 170 500
6. A rechargeable battery is a source of
A alternating current
B direct resistance
C alternating resistance
D direct current

### Page 5

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Household insulation
Sarah and Amy compare the effectiveness of different types of insulation.
They test four houses in the middle of a row of six.
They keep the temperature the same in all six houses by using a computer to switch the heating on
and off.
X P Q R S Y
Here is some of the information that they collect.
Before they were insulated, the fuel bill for each test house was £800 for one year.…read more

### Page 6

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Which form of insulation is most cost effective over three years?
A draught proofing
B double glazing
C loft insulation
D cavity wall insulation
15. The electric heater in each house has an earth wire.
The earth wire provides
A protection for the user
B protection for the fuse
C the current to the heater
D the current from the heater
16. Sarah uses this equation to calculate the efficiency of a heater in one of the houses.…read more

### Page 7

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Higher tier candidates start at question 17 and answer questions 17 to 40.
Questions 17 to 24 must be answered by all candidates: Foundation tier and Higher tier.
Wind turbines
A company plans to build a wind farm on a hill near a town.
The plan is rejected.
Instead, the wind farm is to be built in the sea, a few miles away.

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If the wind farm is built in the sea, which of these is not a correct statement?
A There will be less electricity used in the town
B There will be less noise pollution in the town
C There will be less visual pollution in the town
D There will be less damage to land near the town
Controlling current and voltage
Use this information to answer questions 21 and 22.
Elaine and Esther measure the current in different resistors.…read more

### Page 9

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Elaine and Esther find out that a light-dependent resistor (LDR) is used as part of a control
circuit to switch street lights on and off.
They discuss this use of LDRs with some friends.
Who is correct?
The LDR switches on The resistance of the LDR
in the dark. increases as it becomes
darker.
A B
The LDR produces a The resistance of the LDR
high current in the dark. decreases as it becomes
darker.
C D

### Page 10

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Questions 25 to 40 must be answered by Higher tier candidates only.
Foundation tier candidates do not answer questions 25 to 40.
Medical uses of electricity
25. Doctors use a defibrillator when a patient's heart has just stopped beating.
The defibrillator gives an electric shock to help the heart beat normally.
Peter and Rachel say:
Electric shocks should not
Doctors use electric shocks
be used because they are
because they are a tried and
dangerous.