Electronics
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Relay definition
Acts as a link between so that a lower voltage circuit can control a higher voltage circuit.
Why is using a microcontroller preferable to building a prototype?
Cheaper, because they do not require physical components. Easier to fix mistakes because no real components. Real, expensive components will not be damaged if a a mistake is made.
Why do solar panels help combat climate change?
They reduce the need for power produced from fossil fuels, therefore reduce the amount of CO2 produced.
What is the purpose of a diode?
To protect the transistor from back EMF
Advantages of parallel lamps?
All lamps will operate at the same voltage. If one lamp fails, the others will remain on.
How does a MOSFET work?
Voltage across gate < 2V no channel, no current flow Voltage across gate > 2V channel opens, current flow As the gate Voltage increases, the drain current increases
Difference in the output current between MOSFETs and BJTs
The operation of a MOSFET is controlled by its gate-source voltage The operation of a BJT is controlled by its base current.
Why would someone choose a MOSFET over a BJT?
MOSFETs can handle larger currents and therfore operate larger output devices. MOSFETs consume less power therfore are more efficient.