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Electric and electronic circuits
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What device converts alternating current (AC) into direct current (DC)?
Rectifier (or diode)
What electronic component is used to amplify or switch signals?
Transistor
What is the component called that stores electrical energy in an electric circuit?
Capacitor
Why are PCBs better than using loose wires for connections?
They are more compact, reliable, organized, and easier to mass-produce.
What material is typically used as the base (insulator) of a PCB?
Fiberglass or epoxy resin
What happens to a signal when it passes through a low-pass filter?
High frequencies are removed, leaving only low frequencies.
Give one practical example of where filters are used.
In radios, audio systems, communication devices, etc
What is the purpose of a PCB?
To support and connect electronic components using conductive tracks.
What part of a signal determines how often it repeats per second?
Frequency
What is a signal in electronics?
A time-varying electrical quantity (voltage or current) that carries information.
What is the main difference between an electric and an electronic circuit?
Electric circuits control power; electronic circuits control information/signals.
What kind of components do electronic circuits use to process signals?
Active components like transistors, diodes, ICs
What does PCB stand for?
Printed circuit board
What does a filter do in a circuit?
It allows certain frequencies to pass and blocks others.
Give one example of an electric circuit.
Open answers (a lightbulb, an electric engine…)
What type of circuit mainly controls electric power — electric or electronic?
Electric circuits
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