Physics Test - Pt2

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Electronic Systems
-come in three parts: Input - Process - Output
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Input Devices
-convert one from of energy into electrical energy to be processed
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Output Devices
-convert electrical energy into another form of energy, after being processed
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Electronic Signals
-digital & analogue
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Analogue
-wave pattern has many different values of voltage, -voltage changes over a set amount of tome
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Digital
-has fixed values of voltage, -voltage is at one particular value for a set amount of time
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Binary Signals
-a digital signal which is either on or off, ON = HIGH = 1, OFF = LOW = 0
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Solar Cells
Input Device, light energy - electrical energy
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Microphone
Input Device, sound energy - electrical energy
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Thermocouple
Input Device, heat energy - electrical energy
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Thermistor
-changes with temperature, increase in temp. gives a decrease in resistance TURD (Temp. Up Resistance Down)
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LDR
-changes with light level, an increase in light level gives a decrease in resistance LURD (Light Up Resistance Down)
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Loudspeaker
Output device, ANALOGUE, electrical energy - sound energy
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Buzzer
Output device, DIGITAL, electrical energy - sound energy
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Motor
Output device, ANALOGUE, electrical energy - kinetic energy
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Solenoid
Output device, DIGITAL, electrical energy - kinetic energy
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Lamp
Output device, ANALOGUE, electrical energy - light energy
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LED (Light Emitting Diode)
Output device, DIGITAL, electrical energy - light energy
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NOT Gate
-inverts the input, used when opposite output is needed
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AND Gate
-needs two HIGH inputs to be ON, used when an output comes on with both inputs on
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OR Gate
-needs only one HIGH input to be ON, used when an output comes on with either input on
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Magnetic Materials
-naturally magnetic materials are made from iron, cobalt or nickel
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Magnetic Poles
-opposite poles will attract each other, similar poles will repel each other
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Electromagnetism
-forcing electrical charges to move through an electric field will produce a magnetic field
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Electromagnets
-can be made by winding a conducting wire around an iron core and passing an electrical current along the wire
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Increasing the strength of an electromagnet
-increasing the number of coils of wires around the iron nail or increasing the voltage
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Advantages of an electromagnet
-they can be switched on an doff, the strength can be changed
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Uses of Electromagnets
-electric bells, relay switch
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Other cards in this set

Card 2

Front

-convert one from of energy into electrical energy to be processed

Back

Input Devices

Card 3

Front

-convert electrical energy into another form of energy, after being processed

Back

Preview of the back of card 3

Card 4

Front

-digital & analogue

Back

Preview of the back of card 4

Card 5

Front

-wave pattern has many different values of voltage, -voltage changes over a set amount of tome

Back

Preview of the back of card 5
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