What is the function of sliding rheostat

Function: 1. Protect the circuit: to prevent excessive current from burning out the experimental equipment during the experiment; 2. Change the resistance: the sliding rheostat plays the role of controlling the circuit by changing its own resistance; 3. , change the current and voltage: When used as a fixed-value resistor, the sliding rheostat plays the role of voltage dividing or current limiting; when used as a variable-value resistor, the resistance of the sliding rheostat will change according to the needs of the experiment, playing the role of The effect of changing the current and voltage; 4. Measure resistance by voltammetry: The sliding rheostat is used to change the values ​​of voltage and current in the experiment. Measure several sets of data and average them to reduce the error.

The sliding rheostat has the following main functions in the circuit:

1. Protect the circuit: When connecting the sliding rheostat , requiring "one up, one down, focus on the bottom", each using a binding post for the metal rod and resistance wire; the actual connection should select two binding posts for the resistance wire according to the requirements. This can play a role in protecting the circuit, that is, preventing excessive current from burning out the experimental equipment during the experiment.

2. Change the resistance: The sliding rheostat plays the role of controlling the circuit by changing its own resistance. In the experiment, by adjusting the sliding rheostat, changes in parameters such as current and voltage can be observed.

3. Changing current and voltage: Sliding rheostat can be used as either a fixed value resistor or a variable value resistor in a circuit. When used as a fixed value resistor, the sliding rheostat plays the role of voltage dividing or current limiting; when used as a variable value resistor, the resistance of the sliding rheostat will change according to the needs of the experiment, playing the role of changing the current and voltage. .

4. Measuring resistance by voltammetry: Using the deformation formula of Ohm's law R=U/I, when the voltage and current of a certain circuit are known, the resistance of this circuit can be calculated . Sliding rheostat is used to change the values ​​of voltage and current in experiments, measure several sets of data, and then average them to reduce errors.

If you need more specific information, it is recommended to consult professionals in the field of physics or consult physics books.

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