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iGCSE (Pre – 2017 Questions)
IGCSE Electrical ChargePractice Exam Questions
Qu. Mark MaxImprovement
pointSKREAM
1 6
2 6
3 7
4 6
5 3
6 8
Total 36
Overall Comment
1
S I made a silly slip
K I just did not know the science
R I misread the question
E My writing was not clear/ detailed
A I did not apply the knowledge
M I applied the maths incorrectly
iGCSE (Pre – 2017 Questions)
Questions
Q1.
The photograph shows an investigation of static electricity.
A teacher rubs a balloon with a cloth so that the balloon gains a positive charge.
She then holds the balloon close to her head, and her hair rises.
(a) Explain, in terms of moving charges, how the balloon becomes positively charged.
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(b) Explain why the teacher's hair rises.
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iGCSE (Pre – 2017 Questions)
(c) Suggest why the charge remains on the balloon even when it is being held.
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(d) Suggest why the experiment does not work so well when the air is humid (damp).
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(Total for question = 6 marks)
3
iGCSE (Pre – 2017 Questions)
Q2.
When a plastic rod is rubbed with a cloth, the rod gains charge.
(a) How could you show that the plastic rod gains charge?
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(b) Explain how the plastic rod gains charge when it is rubbed.
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iGCSE (Pre – 2017 Questions)
(c) There are two types of charge.
Describe how you could demonstrate this using different insulating rods and a cloth.In your answer, you should name any other equipment you would use.
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(Total for question = 6 marks)
5
iGCSE (Pre – 2017 Questions)
Q3.
This question is about static electricity.
(a) Which of these materials is an electrical conductor?(1)
A paper
B plastic
C silver
D wood
(b) A forensic scientist uses an electrostatic dust print lifter (EDPL) to take impressions offootprints.
The diagram shows a simplified EDPL and a description of how it works.
Use the idea of charge movement to explain how the lifting sheet becomesnegatively charged and the metal plate becomes positively charged.
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iGCSE (Pre – 2017 Questions)(c) The photograph shows a typical dust print on a lifting sheet.
Suggest why dust particles are lifted off the floor on to the lifting sheet.(2)
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iGCSE (Pre – 2017 Questions)
(d) This photograph shows a charged polythene rod placed next to a stream of waterflowing from a tap.
Suggest why the water is deflected.(2)
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(Total for question = 7 marks)
8
iGCSE (Pre – 2017 Questions)
Q4.
The photograph shows a worker fuelling an aircraft.
Fuelling an electrically-charged aircraft can be dangerous.
The worker connects a safety wire to the aircraft before adding the fuel.
(a) Explain how an aircraft can become electrically charged while it is flying.(2)
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(b) Describe a possible danger of fuelling an electrically-charged aircraft.(1)
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iGCSE (Pre – 2017 Questions)
(c) What electrical connection is made by the safety wire?(1)
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(d) Explain how connecting the safety wire reduces the possible dangers when fuellingan electrically-charged aircraft.
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(Total for question = 6 marks)
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iGCSE (Pre – 2017 Questions)
Q5. (d).
Explain what happens when a storm cloud discharges.(3)
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(Total for question = 3 marks)
11
iGCSE (Pre – 2017 Questions)
Q6.
This question is about electrostatic charges.
(a) Complete the sentences using words from the box.Each word may be used once, more than once or not at all.
(2)
When a plastic rod is rubbed with a cloth, the plastic rod gains ..............................................................
After the plastic rod has been rubbed with the cloth, the plastic rod has a
.............................................................. charge.
(b) Electrostatic charges can be useful during paint spraying.
(i) The droplets of paint are given the same charge as they leave the sprayer.Explain why this is an advantage.
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iGCSE (Pre – 2017 Questions)
(ii) The droplets of paint are positively charged.The object being painted is given a negative charge.Explain why this is an advantage.
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(c) Give one hazard caused by electrostatic charges and state how the risk from thishazard can be reduced.
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(Total for question = 8 marks)
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iGCSE (Pre – 2017 Questions)Q1.
Q2.
14
iGCSE (Pre – 2017 Questions)
Q3.
15
iGCSE (Pre – 2017 Questions)
Q4.
Q5.16
iGCSE (Pre – 2017 Questions)
Q6.
17
