Physics- Electricity 0.0 / 5 ? PhysicsElectricityGCSEAQA Created by: Parneet DhillonCreated on: 27-03-15 14:27 What kind of charge can a charged object be? Negatively or positievly charged 1 of 28 What have negatively charged objects done? Gained electrons 2 of 28 What have positively charged objects done? Lost electrons 3 of 28 Where can static electricity be used? Photocopier, Dust extractors in factory chimneys, Spray painting cars, Defibrillator, Smoke precipitator. 4 of 28 What kind of charge does an electron have? A very tiny charge 5 of 28 What carries the electric charge in solids? Electrons 6 of 28 What is electric current measured in? Amperes (Amps) (A) 7 of 28 What is the outer casing of a cable made from? Plastic 8 of 28 How many wires are there inside a cable and what are they made from? 3 copper wires 9 of 28 What is the brown wire? The live wire 10 of 28 What colour is a neutral wire? Blue 11 of 28 What is the green and yellow striped wire? The earth wire 12 of 28 What are two ways of protecting devices against electrical surges? Fuses and circuit breakers 13 of 28 What is a fuse? A device that is used to protect appliances from a current that is too high. 14 of 28 What are fuses labelled with? The maximum amount of current they will allow to pass through 15 of 28 If a kettle has an operating current of 4.3A. Which fuse would you use? 5A, 7A, 4A, 5A 16 of 28 What do earth wires and fuses do? Protect the user 17 of 28 What will an earth wire stop? They stop a person from recieving an electric shock if they touch the case of a faulty appliance. 18 of 28 What happens when a faulty case becomes live? A large current flows in the earth and live wires and the fuse blows. 19 of 28 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. 20 of 28 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. 21 of 28 What happens in a simple series circuit? Everything is connected in one loop across the terminal of the battery 22 of 28 What is current measured with? A device called an ammeter. 23 of 28 What is another name for voltage? Potential difference 24 of 28 What is used to measure voltage? A voltmeter 25 of 28 What is the unit of measurement for voltage? The volt and the symbol is a V 26 of 28 How is current found? By measuring within the circuit 27 of 28 How is voltage found? By measuring around the component 28 of 28
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