Exam Questions
1. [2006 OL]
A student set up the circuit drawn on the right to investigate different
materials to see which were electrical conductors and which were
electrical insulators.
(i) What would you expect to observe when an electrical conductor is
connected between the contact points A and B? Give a reason for your
answer.
(ii) What would you expect to observe when an electrical insulator is
connected between the contact points A and B? Give a reason for your
answer.
2. [2008]
Two rods A and B, made from different plastics, were given the static
electrical charges shown in the diagram.
How could you have charged the rods as shown?
3. [2008]
Describe with the help of a labelled diagram how the force between
the two charged rods A and B could be investigated.
What result would you expect from this investigation?
4. [2011 OL]
The diagram shows a freely suspended charged rod.
(i) What happens when a similarly charged rod is brought close to the suspended rod?
(ii) What does this tell us about like charges?
5. [2008]
In dry weather you can sometimes get an electric shock from a supermarket trolley.
This is caused by the build-up of static electricity on the trolley.
Explain clearly why this only happens in dry weather.
6. [2009][2012]
A plastic pen when rubbed with a dry cloth can attract small pieces of paper which
‘stick’ to it.
(i) Why does this happen?
(ii) Explain why the pieces of paper fall from the pen after some time.
7. [2011]
The boy in the photo is touching a charged globe that is at high voltage.
He is insulated from the earth.
What property of electric charge causes the boy’s hair to stand on end and
apart?
8. [2006 OL]
(i) What type of energy generates lightning?
