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Higher Electronic Components Function/Names
Learn the functions of analogue components for Higher Engineering Science
17
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Not Applicable
05/11/2020

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Term
Light Dependant Resistor (LDR)
Definition
Resistance changes with the light level. as light gets brighter the resistance decreases. (BURD)
Term
Variable Resistor
Definition
Allows the user to change the resistance manually.
Term
SPST Switch
Definition
Allows the user to control the flow of electricity.
Term
Battery
Definition
Provides the electrical energy for the circuit.
Term
Buzzer
Definition
Changes electrical energy into sound energy.
Term
Motor
Definition
Changes electrical energy into kinetic energy.
Term
Voltmeter
Definition
Used to measure the voltage being dropped across a component.
Term
Diode
Definition
Only allows current to flow in one direction only.
Term
Lamp
Definition
Changes electrical energy into light energy.
Term
Relay
Definition
Allows the user to control a high powered circuit via a low powered circuit.
Term
Resistor
Definition
The higher the resistance the lower the current.
Term
Thermistor
Definition
Resistance changes with temperature. Temperature goes up then resistance decreases. (TURD)
Term
Transistor
Definition
A current amplifier which switches on when 0.7v are dropped across it.
Term
Ammeter
Definition
Measures current in a circuit.
Term
Light Emitting Diode (LED)
Definition
Only allows current to flow in one direction only and emits light when the current flows through it.
Term
MOSFET
Definition
A voltage operated switch. The it allows current to flow when the voltage at its gate exceeds its threshold. The more voltage the more current allowed to flow.
Term
Potentiometer
Definition
Acts as a voltage divider which can be changed manually.
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