Revision of Electrical Circuits
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Positive against Positive | Attract
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Negative against Negative | Repel
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Positive against Positive | Repel
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A material such as all metals that let current through are called? | Conductors
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A material that does'nt let current through such as wood, plastic or rubber what are they called? | Insulators
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What is resistence? | Resistance is something that makes it harder for the current to flow
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What 3 things increase resistance? | 1)Longer lenght of wire2)Thinner lenght of wire 3)Obstacles such as bulbs,buzzers,motors etc
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What 3 things decrease resistance? | 1)Shorter wire 2)Wider wire 3)Less obstacles such as bulbs,motors,buzzers etc
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Name 2 ways in which we use resistance in everyday life | 1) To increase and decrease volume on a CD player 2)To increase or decrease light
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A cell | 1 battery but don't call it that
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A battery | 2 or more cells
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How many volts approximately is mains electricity? | 240 volts
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Fuses | Fuses stop the current getting to great.The wire breaks if it goes over the ... A Fuse
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What is the series circuit? | The battery in a series circuit gives off a certain amount of energy that then get's split equally around the circuit.So by adding 1 more bulb it would divide the energy by 2
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What is the parallel circuit? | When the battery in the parallel circuit gives off energythen however many bulbs you add they would get the same amount as the 1 bulb that started coz the battery gives out as much energy as needed.You can also turn off one bulb at a time which is useful.
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Bulb | Light
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Switch | Switch
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Cell | Less than a battery
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Battery | More than a cell
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Ammeter | Measures amps
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Voltmeter | Measures volts
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Connecting wire | wire
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Two ways switch | Can follow one or another routes
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Fuse | Stops wire from exploding from the heat
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Buzzer | Buzzes
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Motor | Uses electricity to make things happen
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Current/Amps | Current is how much electrical charge is in the circuit.It is measured in amps
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Voltage | Voltage measures the difference in electrical energy around the circuit.You use it in parallel
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