Which one of the following transformers has only single winding?

Which one of the following transformers has only single winding? Correct Answer Autotransformer

Autotransformer:

• An Auto Transformer is a transformer with only one winding wound on a laminated core.
• An autotransformer is similar to a two-winding transformer but differs in the way the primary and secondary winding are interrelated.
• A part of the winding is common to both primary and secondary sides.

IMPORTANT NOTES:

Pulse transformer:

• A pulse transformer is an enhanced transformer that produces electrical pulses of great velocity and constant amplitude.
• They are often used in the transmitting of digital information and transistors.
• A pulse transformer is an enhanced transformer that produces electrical pulses of great velocity and constant amplitude.
• They are often used in the transmitting of digital information and transistors

Potential transformer:

The potential transformer may be defined as an instrument transformer used for the transformation of voltage from a higher value to a lower value. 

• This transformer step down the voltage to a safe limit value which can be easily measured by the ordinary low voltage instrument like a voltmeter, wattmeter and watt-hour meters, etc.
• The basic principle of operation and construction of this transformer is similar to the standard power transformer.

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