Which one of the following transformers has only single winding?

This question was previously asked in
ALP CBT 2 Electronic Mechanic Previous Paper: Held on 21 Jan 2019 Shift 1
View all RRB ALP Papers >
  1. Autotransformer
  2. Pulse transformer
  3. Current transformer
  4. Potential transformer

Answer (Detailed Solution Below)

Option 1 : Autotransformer
Free
General Science for All Railway Exams Mock Test
2.1 Lakh Users
20 Questions 20 Marks 15 Mins

Detailed Solution

Download Solution PDF

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.

F2 Pinnu K 09-10-20 Savita D4

IMPORTANT NOTES:

Pulse transformer:

  • 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.
  • 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

F2 Pinnu K 09-10-20 Savita D5

F2 Pinnu K 09-10-20 Savita D6

Current transformer:

current transformer (CT) is a type of transformer that is used to reduce or multiply an alternating current (AC).

  • It produces a current in its secondary which is proportional to the current in its primary.
  • The current transformer is used with the AC instrument, meters or control apparatus where the current to be measured is of such magnitude that the meter or instrument coil cannot conveniently be made of sufficient current-carrying capacity.
  • The current transformer is used for measuring the high voltage current because of the difficulty of inadequate insulation in the meter itself.
  • The current transformer is used in meters for measuring the current up to 100 amperes.

F1 Pinnu K 09-10-20 Maduh D1

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.

F1 Pinnu K 09-10-20 Maduh D2

Latest RRB ALP Updates

Last updated on Jun 11, 2025

-> The RRB NTPC Admit Card 2025 has been released on 1st June 2025 on the official website.

-> The UPSC Prelims Result 2025 and UPSC IFS Result 2025 has been released @upsc.gov.in

-> Railway Recruitment Board activated the RRB ALP application form 2025 correction link, candidates can make the correction in the application form till 31st May 2025. 

-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.

-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.

-> The official RRB ALP Recruitment 2025 provides an overview of the vacancy, exam date, selection process, eligibility criteria and many more.

->The candidates must have passed 10th with ITI or Diploma to be eligible for this post. 

->The RRB Assistant Loco Pilot selection process comprises CBT I, CBT II, Computer Based Aptitude Test (CBAT), Document Verification, and Medical Examination.

-> This year, lakhs of aspiring candidates will take part in the recruitment process for this opportunity in Indian Railways. 

-> Serious aspirants should prepare for the exam with RRB ALP Previous Year Papers.

-> Attempt RRB ALP GK & Reasoning Free Mock Tests and RRB ALP Current Affairs Free Mock Tests here

Get Free Access Now
Hot Links: teen patti master apk best teen patti apk teen patti joy official teen patti bindaas