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Electricity

Electricty

QuestionAnswer
Electricity Form of energy
Current Electricty a steady flow of charge though wires and circuits
Static Electricity involves electric charge collecting in one place and sometimes suddenly jumping from one place to another. e.g. lightning
Uses of static electricity forensic finger printing, touchscreen technology, clingfilm
Circuit The flow of electrons in a wire
Electrons Have a negative charge
Conductors substances that allow electricity to travel through them.
Insulators substances that do not allow electricity through themselves.
Fuse a safety device - too much current through circuit and fuse blows
brown live wire (right)
green/yellow earth
blue neutral (left)
Current (I) Measured in Amps (A) using an Ammeter - in series
Voltage (V) / Potential difference Measured in Volts (V) using a voltmeter - in parallel
Ohms Law V = I x R
Resistance (R) Measured in Ohms using an Ohmmeter
Diode a device that allows current to flow through it in one direction only.
Light Emitting Diode This type of diode emits light when it is connected in forward bias.
Light Dependent Resistor is a type of variable resistor that changes resistance dramatically in response to light.
Thermistor is a device made of material that reduces its resistance significantly when the temperature of the device changes
Power Power (Watts) = current x voltage
Created by: hollymcgovern
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