Question
Download Solution PDFIdentify the device used to change the resistance in an electric circuit.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFKey Points
- A Rheostat is an adjustable resistor used in applications that require the adjustment of current or the varying of resistance in an electric circuit.
- Unlike a fixed resistor, a rheostat allows for the manual adjustment of resistance to control current flow.
- Common applications include light dimmers, motor speed controllers, and adjusting the volume of audio devices.
- Rheostats are typically constructed with a resistive wire wound around an insulating ceramic core, with a sliding contact that moves along the wire.
Additional Information
- An Ammeter is used to measure the current in a circuit.
- A Conductor allows the flow of electric current with minimal resistance.
- A Voltmeter is used to measure the voltage across two points in a circuit.
- Rheostats are often used in educational settings for experiments and demonstrations involving Ohm's law and other electrical principles.
- They are crucial components in circuits where variable resistance is required for tuning or calibration purposes.
Last updated on May 28, 2025
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