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What are 2 possible uses for a variable resistor?
It functions as a resistive divider and is typically used to generate a voltage signal depending on the position of the potentiometer. This signal can be used for a very wide variety of applications including: amplifier gain control (audio volume), measurement of distance or angles, tuning of circuits, and much more.
What is variable resistor and its uses?
A variable resistor is a type of resistor whose electrical resistance value can be adjusted on demand. Variable resistors are used in an electronic circuit to adjust circuit resistance as a means to control the voltage or current within a circuit (as per Ohm’s Law).
Where would a variable resistor be used?
A variable resistor is used in some dimmer switches and volume controls. The resistance of a thermistor depends on its temperature.
What are the uses of resistors?
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.
What is a variable resistor used for?
Variable resistor A resistor limits the passage of electrical current. A fixed resistor has a resistance that does not change. The resistance of this resistor is changed by moving the position of a slider. A variable resistor is used in some dimmer switches and volume controls.
What devices use a variable resistor?
Applications of Variable Resistors
- Audio control.
- Television.
- Motion control.
- Transducers.
- Computation.
- Home Electrical Appliances.
- Oscillators.
What is a variable resistor used for GCSE?
Why are resistors used in alarms?
Adding resistors to the sensor circuit path allows the alarm panel to determine more than if the circuit is simply open or closed. It can be used to differentiate between an active alarm, alarm tampering by cutting a wire, and a short in a wire. The resistor should be placed at the sensor to better detect cut wires.
Why do you use a variable resistor?
A variable resistor is very important. It allows you to build a circuit with some degree of control . For example, a volume knob can be a variable resistor. It can act as a control on the amount of current flowing.
What are the uses of a variable resistor?
Applications of Variable Resistors Audio control Television Motion control Transducers Computation Home Electrical Appliances Oscillators
Does a variable resistor have have a fixed resistance?
The variable resistors are the one which offers variable value of resistance. Thus, it is also known as an adjustable resistor. Variable resistor has three leads, in which two leads are fixed, and one is movable. Thus, through with this movable lead the value of the resistance varies.
What are two uses for variable resistors?
Variable Resistor Applications They are used to control the speed of DC motors. They are used in household applications like to change the speed of ceiling fans. They are frequently used in laboratories in educational institutes and research wings for carrying out experiments. Other common applications of potentiometers are, controlling sound, light intensity, etc.