P4a: Sparks

The concept of medical physics runs through this item. Electrostatics plays an important part in our lives. We investigate some of the ideas of electrostatics and look at the problems caused.

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What happens when some items are rubbed? Give an example.
They attract other objects. Some dusting brushes become charged and attract dust as they pass over it.
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How can insulating material become charged?
By rubbing with another insulating material.
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What are the two types of charges?
Positive and negative.
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What charged clothing can you get an electric shock from? (2)
Nylon and synthetic.
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You can get an electric shock from clothing or what? and explain.
Becoming charged and then earthed. Caused by friction.
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Give an example of how to get an electric shock, from earthing.
Touching water pipes after walking on a floor carpet with insulating material. (synthetic carpet)
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What do like charges do?
Repel.
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What do unlike charges do?
Attract.
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What is electrostatic phenomena caused by? What charge does it have?
Caused by the transfer of elections, has a negative charge.
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Complete the sentence: A positive charge is due to ______ of electrons.
Lack.
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Complete the sentence: A negative charge is due to ______ of electrons.
An excess.
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What are atoms/molecules that have been charged called?
Ions.
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In what two situations can static electricity be dangerous?
1. In situations where large quantities of charge could flow through the body to earth. 2. In atmospheres where explosions could occur, e.g. inflammable gases or vapours or with high concentrations of oxygen,
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In what two ways can static electricity be a nuisance?
1. Dirt and dust attracting to insulators (tv monitors, plastic containers.) 2. Causing clothing to cling.
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How can the chance of being electrocuted reduced?(4)
Correct earthing, using insulating mats, using shoes with insulating soles and bonding fuel tanker to aircrafts.
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Explain how using an earthing wire reduces the chance of getting an electric shock.
The charged object is connecting to an earth wire so any charge immediately flows down it.
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Explain how using insulated mats and shoes reduces the chance of getting an electric shock.
They stop charge flowing through them to earth.
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How do anti-static sprays, liquids and cloths reduce the problems of static electricity?
Anti-static sprays, liquids and cloths prevent the build-up of charge by allowing it to conduct away.
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Other cards in this set

Card 2

Front

How can insulating material become charged?

Back

By rubbing with another insulating material.

Card 3

Front

What are the two types of charges?

Back

Preview of the front of card 3

Card 4

Front

What charged clothing can you get an electric shock from? (2)

Back

Preview of the front of card 4

Card 5

Front

You can get an electric shock from clothing or what? and explain.

Back

Preview of the front of card 5
View more cards

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