Introduction

Question 1

What is a transformer?

Answer 1

It is a static device that transfers power from one circuit to another circuit at constant power and constant frequency.

Question 2

Parameters that are constant in a transformer?

Answer 2

1. Constant frequency machine
2. Constant power machine
3. Constant flux machine

Question 3

What is the type of coupling in a transformer?

Answer 3

Negatively coupled circuit. Windings are magnetically coupled but electrically isolated.

Question 4

Why is a transformer called a phase-shifting device?

Answer 4

A transformer is a phase-shifting device as it offers 180° phase displacements between primary and secondary. i.e the angle between voltage and induced emf is 180°

Question 5

What is the type of feedback in a transformer?

Answer 5

Negative feedback-controlled device

Question 6

Transformer resembles which parameters?

Answer 6

The transformer is a two-port network with ABCD Parameters

Question 7

Principle of Transformer?

Answer 7

Faraday’s laws of Electromagnetic Induction - Mutual Induction