Contents
Why is potentiometer better than variable resistor?
In the potentiometer the resistance of the track remains the same as the wiper moves, and only the potential on the wiper changes. In a variable resistor the resistance of the track apparently changes as the wiper moves and short circuits more or less of the track resistance.
How do you control a variable resistor?
Variable resistors can be altered to control either the current or voltage of a circuit. Common types include potentiometers that are operator controlled and thermistors that change resistance according to temperature.
Where is a potentiometer used in real life?
Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment. Potentiometers operated by a mechanism can be used as position transducers, for example, in a joystick.
How to select resistance of a potentiometer?
Steps Find out what the rating of the potentiometer is. This is actually the total resistance measured in ohms and it can usually be found written on the bottom or Get an ohmmeter which you will set to a setting that is higher that your potentiometer’s total resistance. Take a closer look at the potentiometer. Take the probes of your ohmmeter.
How can a variable resistor be used?
Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity. Resistors are common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment.
Does a variable resistor change the resistance?
As the name implies, the resistance of the variable resistor is changeable. It is easy to vary or change the resistance of a variable resistor to a desired value. Variable resistors are mostly used when the user do not know what exact resistance value does he want.
What are variable resistors used for?
Variable resistors are used to dynamically change the resistance to control the current in a circuit, and may also be used as a voltage divider. For example, they are used to control the volume in a radio.