Transformers and Turn Relationships

In this lab, students will learn about transformers. Transformers are devices that use electromagnetic induction to increase and decrease the voltages of AC signals. They allow us to manage the logistics of power transmission and to establish a suitable voltage for each power use. The output of a transformer is determined by the ratio of turns in its two coils, also known as the turn relationship. Students will work with two different simulations in order to understand how a transformer's turn relationship affects voltage and current and to investigate transformer power efficiency.

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This is lab 9 of 10 in the course, Introduction to Circuits.


After completing this lab, students will be able to:
  1. Discuss the relationship between the turn count in a transformer and the expected output of a transformer.
  2. Calculate the power efficiency of a transformer.


  • Basic proficiency using Multisim Live
  • Basic proficiency using ELVIS III Instruments
  • Basic knowledge of breadboarding
  • Basic knowledge of components and their behaviors


Engineering laboratory solution for project-based learning that combines instrumentation and embedded design with a web-driven experience, delivering a greater understanding of engineering fundamentals and system design.

TI Analog Parts Kit for NI ELVIS III

A set of components for circuits and electronics education provided by Texas Instruments which includes all components and building blocks of any introductory electronics laboratories.

Multisim Live

Multisim Live is an online, touch-optimized component of Multisim, so students can design and simulate their circuits anywhere, anytime, on any device.

Required Software

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Required Hardware

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