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Electrical systems - Coggle Diagram
Electrical systems
Resistance
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The higher the resistance, the harder it is for the current to flow through. Hence, the current will be lower.
Insulators have high resistance, conductors have low resistance.
Resistors
Resistors are electrical devices that control the flow of the current through a circuit by controlling the resistance of the electric circuit.
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Variable resistors
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Using the slider to control the amount of wire the current needs to flow through before exiting the resistor.
Safety devices
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Fuses
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Unlike circuit breaker, fuse must be replaced if it blows.
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Earthing
Wires
Live wire
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Circuit breaker, fuses and switches are fitted to this wire.
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Prevents electric shocks as even though the live wire is in contact with the casing, the current flows through the earth wire to the ground instead of the person
3 pin plug
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Earth wire protects the user from electric shocks in the event that an electric fault causes the appliance to be live
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Circuits
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Closed circuit
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Electricity is able to flow from one end of the cell, through the electrical components, to the other end of the cell.
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Electrical power
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Kilowatt-hour is a unit of electrical energy
Commonly used to calculate electrical energy used instead of joule (J)
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