Components and Symbols (Junior Cert Applied Technology): Flashcards

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Components and Symbols
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Resistor function

Reduces electric current flow

Resistor measurement unit

Ohms (Ω)

Ohm's Law for resistance

R=V/IR = V/I

Capacitor function

Stores electrical energy

Capacitor behaviour with DC and AC

Blocks DC, allows AC to pass

LED full form

Light-emitting diode

LED characteristics

Energy-efficient and durable

Switch function

Controls current by opening or closing circuit

Types of switches

Push-to-make and toggle

Resistor symbol

Zigzag line or rectangle

Capacitor symbol

Parallel lines

LED symbol

Diode with arrows representing light

Switch symbol

Lines or arrows for open/closed states

Resistor use in LED circuits

Limits current to protect parts

Capacitor uses

Filtering, power supplies, audio devices

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