P4 - Sparks

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What does an atom consist of?
A small positively charged nucleus surrounded by an equal number if negatively charged electrons
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What are electrostatic effects due to?
The movement of electrons
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What is the law of electric charge?
Like charges repel, unlike charges attract
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What happens when a polythene rod is rubbed with a duster?
Electrons are transferred from the duster to the polythene, making the polythene rod negatively charged
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What happens when a acetate rod is rubbed with a duster?
Electrons are tranferred from the acetate to the duster, leaving the acetate rod positively charged
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In general, why would an object have a negative charge?
Because of an excess of electrons
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In general, why would an object have a positive charge?
Because of a lack of electrons
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What is an ion?
Atoms that have become charged
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What could happen when imflammable gases or vapours are present, or there is a high concentration of oxygen?
A spark from static electricity could ignite the gases or vapours and cause an explosion
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What would happen if a person touches something at a high voltage?
Large amounts of electric charge may flow through their body to earth
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Can small amounts of charge flowing through the body still be fatal?
YES
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How can be electric shocks be avoided?
Earth wires (any build up of charge that is likely to be charged that is connected to earth would go down it), Insulating rubber mat(stops charge flowing through them to earth), shoes with insulating soles, fuel tankers(connected to an aircraft)
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What are some examples of static electricity?
Dust and dirt are attracted to insulators, such as TV. Clothes made from synthetic materials often cling to eachother and to the body
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How can static electricity be stopped?
Anti-static sprays, liquids and clothes made from conducting materials carry away electric charge. This prevents build up of charge
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Other cards in this set

Card 2

Front

What are electrostatic effects due to?

Back

The movement of electrons

Card 3

Front

What is the law of electric charge?

Back

Preview of the front of card 3

Card 4

Front

What happens when a polythene rod is rubbed with a duster?

Back

Preview of the front of card 4

Card 5

Front

What happens when a acetate rod is rubbed with a duster?

Back

Preview of the front of card 5
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