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49 Cards in this Set
- Front
- Back
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Define System |
A system is something that has been constructed in an organised way for a particular purpose |
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Examplew of simple systems |
Corkscrews Toaster Kettle Nutcracker |
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What is complex system? |
Transport system Education system Security system |
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What are the 3 elements ina system? |
Input Process Outputs |
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Define input |
The element or material that go into a system. |
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Define process |
Is what happens when these elements and material combine |
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Define Output |
The result of what happened |
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What is an open loop system? |
Requires human intervention |
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What is a closed loop system? |
Works independently doesnt need human intervention |
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What is the control monitor? |
Open or closed loop |
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What is the name of the device that controls temperatures? how does it work? |
A thermostat Measures how much heat is present if it reaches a set amount a certain mechanism kicks in depending on the job of the system..either cool or heat |
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Where do electrons get its name from? |
Electron |
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What is the most important part of an atom in relation to electronics? |
Electrons |
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Current flow of electrons is in a certain direction... t or f |
True |
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Electrons move in materials constantly but in a random ordee till current flows t or f |
True |
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Is static electricity safe and will it harm components? |
No its not safe and it will harm. |
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What are materials that allow current flow called? |
Conductors |
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Materials that prevent current flow are called? 2 |
Non conductor's Insulator |
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What is the material between a conductor and an insulator called? |
A semi conductor |
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Which way does currebt flow? |
From negative to positive terminals |
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What is an Amp? |
A coloumb passing a point in one second |
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If 10 coloumbs pass a point in 1 second how many amps are flowing |
10 |
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Voltafe is defined as |
The potential differency between two points |
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Current is represented by the symbol |
I (i) |
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What is current measured in? |
Amps |
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What is potential difference measured in? |
Volts |
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The greatee the voltage or potential difference then greater the amps could flow t or f |
True |
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Current will only flow when? |
The circuit has a complete path |
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Is current lost when it flows into and out of a compunent in a circuit |
No |
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Label |
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Which end of the diode should be connected to the positive side of the power? |
Cathode |
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At which end is the band closest to on a diode? |
Anode |
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What does LED stand for? |
Light Emitting diode |
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What is resistance measured in? |
Ohms |
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What is forward current in LED ? |
Is the current which flows accross the LEDS leaea from anode to cathode. |
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What is forward voltage? |
Is the volatage drop accross the diode when the volatage at the anode is more positive than that at the cathode |
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How many 0's are associated with mega? |
6 |
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How many 0's are associated with a giga? |
9 |
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How many 0's are asociated with killo? |
3 |
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How many 0's are in milli? |
-3 |
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How many 0's are associated with a nano? |
-9 |
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View many 0's are associated with micro? |
-6 |
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Hoe many 0's are associated with pico |
12 |
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What is a transistor? |
Are semiconductor decides that can be used as a switch or an amplifier |
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How much work is 12 voults equal to? |
12 Joules |
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Joules = |
Volts |
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What is curent measured in? |
Amps |
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What is a multimeter for? |
To test electrical components and circuits |
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The long leg of an Led is? |
The anode |
