Physics: Variable resistors

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9 Terms

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Variable Resistor

A component that can change its resistance to obstruct current flow in an electric circuit.

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Circuit Diagram

A visual representation of an electric circuit using standard symbols to denote components.

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Ammeter

An instrument used to measure the flow of electric current in a circuit.

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Bulb

A device that produces light by passing electric current through a filament or gas.

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Current

The flow of electric charge in a circuit, measured in amperes.

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Resistance

The opposition to the flow of electric current in a circuit, measured in ohms.

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Graphite

A material used in the demonstration of variable resistance due to its conductive properties.

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Pencil Lead

A common form of graphite used in the experiment to demonstrate variable resistance.

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Sliding Contact

A movable part that alters the amount of resistance in a circuit by changing the length of conductive material.