Physics- Electricity

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What kind of charge can a charged object be?
Negatively or positievly charged
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What have negatively charged objects done?
Gained electrons
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What have positively charged objects done?
Lost electrons
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Where can static electricity be used?
Photocopier, Dust extractors in factory chimneys, Spray painting cars, Defibrillator, Smoke precipitator.
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What kind of charge does an electron have?
A very tiny charge
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What carries the electric charge in solids?
Electrons
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What is electric current measured in?
Amperes (Amps) (A)
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What is the outer casing of a cable made from?
Plastic
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How many wires are there inside a cable and what are they made from?
3 copper wires
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What is the brown wire?
The live wire
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What colour is a neutral wire?
Blue
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What is the green and yellow striped wire?
The earth wire
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What are two ways of protecting devices against electrical surges?
Fuses and circuit breakers
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What is a fuse?
A device that is used to protect appliances from a current that is too high.
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What are fuses labelled with?
The maximum amount of current they will allow to pass through
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If a kettle has an operating current of 4.3A. Which fuse would you use? 5A, 7A, 4A,
5A
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What do earth wires and fuses do?
Protect the user
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What will an earth wire stop?
They stop a person from recieving an electric shock if they touch the case of a faulty appliance.
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What happens when a faulty case becomes live?
A large current flows in the earth and live wires and the fuse blows.
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What does it mean if a conductor is earthed (connected to) the ground?
Any charge in it flows safely to the ground and a person touching it won't get an electric shock.
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Why do double insulated appliances not need an earth connection?
It has a plastic case with no electrical connection to it so the case can't become live.
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What happens in a simple series circuit?
Everything is connected in one loop across the terminal of the battery
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What is current measured with?
A device called an ammeter.
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What is another name for voltage?
Potential difference
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What is used to measure voltage?
A voltmeter
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What is the unit of measurement for voltage?
The volt and the symbol is a V
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How is current found?
By measuring within the circuit
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How is voltage found?
By measuring around the component
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Other cards in this set

Card 2

Front

What have negatively charged objects done?

Back

Gained electrons

Card 3

Front

What have positively charged objects done?

Back

Preview of the front of card 3

Card 4

Front

Where can static electricity be used?

Back

Preview of the front of card 4

Card 5

Front

What kind of charge does an electron have?

Back

Preview of the front of card 5
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