Massachusetts Institute of Technology
Sign in Create Account

Magnetizing and Demagnetizing an Iron Rod

An iron bar is used to try to pick up some paperclips or thumbtacks. It is not able to do this because it is not magnetized. The rod is placed in a long solenoid and DC power applied. The rod becomes magnetized and is able to pick up some of the paperclips or tacks. The rod is again placed inside the solenoid and 120 VAC applied. This demagnetizes the rod and it will not pickup any tacks.

Comments (0)

It looks like no one has posted a comment yet. You can be the first!

You need to log in, in order to post comments. If you don’t have an account yet, sign up now!

MIT Department of Physics Technical Services Group

MIT Department of Physics Technical Services Group

Category: Science | Updated 2 years ago

Created
July 25, 2012 15:05
Category
Tags
License
Creative Commons Attribution-NonCommercial (What is this?)
Additional Files


Viewed
4585 times

More from MIT Department of Physics Technical Services Group

DC Motor

DC Motor

Added over 2 years ago | 00:01:17 | 4065 views

Field of a Sphere and an Infinite Plane

Field of a Sphere and an Infinite P...

Added almost 4 years ago | 00:02:23 | 8352 views

MIT Physics Demo -- Telegraph Transmitter

MIT Physics Demo -- Telegraph Trans...

Added 7 years ago | 00:00:36 | 50897 views

MIT Physics Demo -- Galvanometer Principle

MIT Physics Demo -- Galvanometer Pr...

Added almost 7 years ago | 00:00:47 | 49980 views

MIT Physics Demo -- Bicycle Wheel Gyroscope

MIT Physics Demo -- Bicycle Wheel G...

Added almost 7 years ago | 00:01:28 | 171175 views

Fire Extinguisher on a Tricycle

Fire Extinguisher on a Tricycle

Added over 6 years ago | 00:00:53 | 38112 views