What is a variable voltage supply?

A variable power supply is one which includes some means for the user to easily adjust the output voltage and sometimes the current. Adjustment is most often accomplished with a potentiometer, but may also be done with an analog control voltage, a digital input, an autotransformer, etc.

What is a fixed and variable power supply?

Answer: A battery is a fixed DC supply, within its rated working voltage. Rectified DC output from AC supply source without smoothing is a varying DC , not variable. By variable supply we mean a supply whose voltage or current can be varied by some means, and is not fixed once for all.

What is a variable voltage regulator used for?

The function of a voltage regulator is to maintain a constant DC voltage at the output irrespective of voltage fluctuations at the input and (or) variations in the load current. In other words, voltage regulator produces a regulated DC output voltage.

What is variable AC power?

A variable AC power source is a controlled, yet variable, voltage solution. Variable AC power sources are commonly used in conjunction with test equipment to simulate extreme variations of voltage condition.

How does a variable power supply work?

A power supply can be given from the battery or from a hardware circuitry which converts the AC supply into the DC supply or step-down AC to step-up AC and vice-versa. A variable power supply is one which facilitates the user to vary and adjust the desired output voltage and output current.

What is voltage made of?

Voltage is the pressure from an electrical circuit’s power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light. In brief, voltage = pressure, and it is measured in volts (V).

What is AVR and how it works?

An automatic voltage regulator (AVR) is an electronic device that maintains a constant voltage level to electrical equipment on the same load. The AVR regulates voltage variations to deliver constant, reliable power supply.