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Variable Resistor
A component that can change its resistance to obstruct current flow in an electric circuit.
Circuit Diagram
A visual representation of an electric circuit using standard symbols to denote components.
Ammeter
An instrument used to measure the flow of electric current in a circuit.
Bulb
A device that produces light by passing electric current through a filament or gas.
Current
The flow of electric charge in a circuit, measured in amperes.
Resistance
The opposition to the flow of electric current in a circuit, measured in ohms.
Graphite
A material used in the demonstration of variable resistance due to its conductive properties.
Pencil Lead
A common form of graphite used in the experiment to demonstrate variable resistance.
Sliding Contact
A movable part that alters the amount of resistance in a circuit by changing the length of conductive material.
