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The power supply whose output voltage varies with variation in input voltage or output load current is known as

The power supply whose output voltage varies with variation in input voltage or output load current is known as Correct Answer Unregulated Power Supply

The correct answer is 'option 2' 

Concept:

  • The output voltage of an unregulated power supply is not regulated meaning the output voltage changes as the load varies so they do not have voltage regulation. I
  • t provides a constant amount of power. 
  • It provides a predetermined output based on the input and load voltage and even a little variation in the input directly affects the output voltage.
  • An unregulated power supply consists of a transformer, a rectifier and a filter. These little variations in the output voltage are called ripple voltage.

Additional Information

Difference between regulated and unregulated power supply: 

  • A regulated power supply is an embedded circuit which produces a constant output voltage irrespective of the changes in the input voltage or frequency and independent of the variations in the output load conditions.
  • It supplies a stable voltage to a device or circuit that must be operated within specified power supply limits.
  • Conversely, an unregulated power supply is the one that provides a predetermined output based on the input and load voltage and even a little variation in the input directly affects the output voltage.

Important Points

  • None of the electronic circuits work properly with unregulated power supply.
  • They require constant voltage supply regardless of the variations in the input voltage or load current.
  • To do this, a voltage stabilizing device called voltage regulator is used.

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