ELECTROMAGNETIC INDUCTION: An Online Treasure Hunt
for 4th Year High School (Science)
Authored by M. Abuacan and P. Arinto
Electric generators, transformers, rechargeable batteries. These are just some
applications of electromagnetic induction.
In today’s lesson we will find out who discovered electromagnetic induction,
what it is, and why it is considered “a landmark in applied science”.
The lesson requires you to browse through some Web pages in which you will find
out something about electromagnetic induction. A series of questions will guide
your reading. Answers to the questions can be found in the Web pages, which are
listed at random (and not according to the order of questions). After
successfully finding all the answers, move on to the Big Question.
You will work in groups of three or four. Assign one group member to take down
notes/answers and another member to work on the keyboard. But all of you should
read the Web pages and try to locate the answers to the questions asked.
- Electromagnetic induction involves both electricity and magnetism. Which
of the two is induced in the process and which one does the inducing? And what
is another way of saying “to induce”?
- In Faraday’s experiment, is it necessary to draw the magnet entirely into
the coil? Why or why not?
- Why is the principle of induction considered “a landmark in applied
Consider the timeline of discoveries in electromagnetism (given in one of the
websites below). What is one insight you can form from looking at the
- The invention of the dynamo was made possible by the discovery of
electromagnetic induction. What is the significance of the dynamo?
- What invention by Faraday is the precursor of the modern transformer?
- What is one of the medical applications of Faraday’s discovery of induced
The Big Question
To conclude our brief study of Faraday’s discovery, do ONE of the following:
A. Make a 5-minute skit dramatizing how Faraday discovered electromagnetic
induction. Perform the skit in class.
B. Write an imaginary interview of Faraday and then enact the interview (to last
not more than 5 minutes) for the rest of the class.
Make sure all members of your group participate in preparing the skit or
interview. You will perform your skit or interview during the next class
Be creative. Bring Faraday to life.