The turn ratio of a step-up transformer is 10. If the input supply frequency is 50 Hz, what is the output supply frequency?

This question was previously asked in
ISRO (VSSC) Technician Electrician  Feb 2019 Official Paper
View all ISRO Technician Papers >
  1. 500 Hz
  2. 5 Hz
  3. 50 Hz
  4. None of the above

Answer (Detailed Solution Below)

Option 3 : 50 Hz
Free
DRDO Technician Fitter (Rank Booster): Mini Mock Test
5.1 K Users
60 Questions 60 Marks 45 Mins

Detailed Solution

Download Solution PDF

Concept:

Turns ratio for the transformer is given by

\(\frac{{{V_p}}}{{{V_s}}} = \frac{{{I_s}}}{{{I_p}}} = \frac{{{N_p}}}{{{N_s}}}\)

Where,

Vp = voltage on the primary side

Vs = voltage on the secondary side

Ip = current on primary side

Is = current on the secondary side

Np = turns on the primary side

Ns = turns on the secondary side

  • A transformer is a static device which converts electrical power from one circuit to another without changing its frequency.
  • So that input and out supply frequency always remain the same.
  • It steps up (or steps down) the level of AC voltage and current
  • The transformer works on the principle of mutual induction of two coils or Faraday Laws of electromagnetic induction
  • When the current in the primary coil is changed, the flux linked to the secondary coil also changes
  • Consequently, an EMF is induced in the secondary coil due to Faraday laws of electromagnetic induction
  • Electrical power transferred from the primary coil to secondary by magnetic flux.

 

Application:

Irrespective of the other parameters, input, and out supply frequency of the transformer always remain the same.

Thus for a given 50 Hz input supply frequency, the output supply frequency is 50 Hz.

Latest ISRO Technician Updates

Last updated on May 28, 2025

-> ISRO Technician recruitment notification 2025 has been released. 

-> Candidates can apply for the ISRO recruitment 2025 for Technicians from June 2. 

-> A total of 64 vacancies are announced for the recruitment of Technician. 

-> The selection of the candidates is based on their performance in the Written Exam and Skill Test. 

-> Candidates who want a successful selection must refer to the ISRO Technician Previous Year Papers to increase their chances of selection for the Technician post. 

Get Free Access Now
Hot Links: teen patti real cash apk teen patti star apk teen patti wealth teen patti master gold