Resistors are generally called resistors in daily life. It is a current limiting element. After the resistor is connected to the circuit, the resistance of the resistor is fixed. Generally, it has two pins. It can limit the current through the branch it is connected to. The resistor whose resistance cannot be changed is called a fixed resistor. The resistor whose resistance is variable is called a potentiometer or a variable resistor. The ideal resistor is linear, that is, the instantaneous current passing through the resistor is proportional to the applied instantaneous voltage. Variable resistor used for voltage division.
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