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Electricity - Coggle Diagram
Electricity
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safety
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earthing
provides a low resistance path to the earth so if some one does come into contact with a current, it will flow through the earthing wire instead of giving them a shock
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current
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DC currents= constant direction and is produced from a battery and used in some sensitive components computing
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as you increase the resistance in a circuit, the current will decrease V=IR
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electric current in solid metallic conductors is a flow of negatively charged electrons that carry a charge
circuits
series
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fewer wires, cheaper and easier to assemble
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parallel
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if one component breaks, current can still flow through the other parts of the circuit
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LDRs
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as illumination increases, resistance increases
thermistors
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as temperature increases, resistance decreases
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electrons
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when they move onto an object, it becomes negatively charged
when they are lost from an object, that object becomes positively charged
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dangers
as aircrafts fly through the air, friction causes them to be charged with static electricity. after an aircraft has landed there is a possibility of charges escaping to earth as a spark. if his happens when refuelling, it could cause an explosion- this can be controlled by earthing the plane to a conductor as soon as it lands to allow any charge that has built up to flow to earth
uses
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paper is negatively charged in certain regions and then the positively charged paint droplets are attracted to those regions, providing the desired image