Conducting Insulating Answer b Insulating 2 What type of particles are transferred when a insulating material is rubbed Protons Neutrons Electrons c Electrons 3 When an acetate rod is rubbed electrons move ID: 557221
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Slide1
What kind of materials can be given a charge?Conducting Insulating
Answer
b) InsulatingSlide2
2) What type of particles are transferred when a insulating material is rubbed?Protons Neutrons
Electrons
c) ElectronsSlide3
3) When an acetate rod is rubbed electrons move;From the acetate rod to the clothFrom the cloth to the rod
Answer
From the acetate rod to the cloth
Bonus
What will be the charge on the cloth?
Answer
Negative because electrons are negative and now there are more
electrons
than protons (positive).Slide4
4) When an polythene rod is rubbed electrons move;From the polythene
rod to the cloth
From the cloth to the rod
Ans
:
b) From
the cloth to the rod .
Bonus
What will be the charge on the cloth?
Answer
Positive; because electrons are removed to leave more protons then electrons leaving positive charge Slide5
5) A balloon is rubbed on your jumper; explain why the balloon will be attracted to a wall.
Ans
:
Electrons are transferred from the jumper to the balloon due to friction;
Making the balloon negatively charged.
As the balloon approaches the wall, the electrons in the wall are repelled and move away. The positive charges are left behind on the wall and they attracts the negative charge on the balloon.
.Slide6
6) A comb is rubbed on a cloth and held near small pieces of paper; explain why the paper will be attracted to a
comb.
Ans
:
Electrons are transferred from the cloth to the comb due to friction;Making the comb negatively charged.As the comb approaches the small pieces of paper, the electrons in the paper are repelled and move away. The positive charges are left behind on the paper and they attracts the negative charge on the combSlide7
7) Two balloons are rubbed on the Jumper. Explain why the balloons repel each other.
Ans
:
Electrons are transferred from the jumper to
both balloons
due to friction;Making the balloons negatively charged.
As both balloons approaches each other, the electrons in the balloons are repelled and move away.Slide8
8) Explain why a persons hair stands on end when using a Van de Graaff generator.
Ans
:
Electrons are transferred from the machine to the person.
The electrons then move to the persons hair.
Each hair has the same charge, this causes them to repel each other.
Causing them to stand on end.Slide9
9) You have a build up of negative charge because your shoes have been rubbing on a carpet.
Explain how you become charged and what happens to the charge when you touch a metal door handle.
Ans
:
As you walk on the carpet with insulating shoes, electrons are transferred from the carpet to the to you.
The metal door knob is a conductor;
When you touch the handle, electrons can flow from you through the metal door knob to earth, in the process giving you a shock..Slide10
10) How does static electricity build on clouds?
Ans
:
Rain drops and ice bump together inside clouds,
Knocking off electrons;
Leaving the top of the cloud positively charged and bottom negatively charged. This creates a large potential difference-leading to a spark
.Slide11
11) How does paint spraying use electrostatic electricity? (3)
Ans
:
The spray gun is charged, which charges up small drops of paint.
Each paint drop repels all the other paint drops because they are the same charge. The object to be sprayed is charged with an opposite charge which attracts the fine spray.Most electrostatic sprays work in the same way. Slide12
12) How can fuelling cars or any vehicle cause an explosion?
Ans
:
As fuel flows out of the filler pipe to the tank, due to friction electrons are transferred and a charge is built up.
This creates a potential difference between the filler pipe and the tank. Negative
charges can jump the a gap causing a spark. This spark could ignite a flammable liquid. .Slide13
13) How do you to protect against lightening and sparks from static electricity. (4)
Ans
:
Dangerous sparks can be avoided by
connecting
the charged object using a conductor to the ground
. Earthing provides an easy route for static charges to travel into the ground. This means no charge can build up to give you a shock or make a spark.