Open vs Closed Circuit
- A closed circuit lets electricity flow; an open circuit stops it.
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Multimeter
- Measures voltage, current, and resistance in real time.
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Switch
- Opens or closes a circuit to turn things on or off.
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Polarity Test
- Use a multimeter to verify current direction in a diode or battery.
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LED
- Light Emitting Diodes glow when current flows through in the correct direction.
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Ground
- Common connection point for electrical flow to return safely.
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Polarity
- Some components like LEDs and batteries work only in one direction.
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Fuse
- Breaks the circuit if too much current flows.
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Resistor
- Controls how much current flows in a circuit.
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