Magnetic Braking | Eddy Current | Punjabi
Channel: Arvind Gupta
Date: 2016-01-13

This experiment is about the effect of a strong magnet on Aluminum.
Make a wooden stand about 18-inches high.
Place a nail on the top to hang a thread.
Stick a strong NEODYMIUM MAGNET to a steel washer attached to a string.
Bring the magnet close to an Aluminum plate.
The magnet does not stick. It just falls.
Hang the magnet with the washer from the hook.
Take magnet to one side and release it.
The magnet keeps oscillating freely for a long time.
Next put an Aluminum plate below the magnet.
Once again release the magnet.
This time the magnet stops quickly.
The eddy currents produced in the Aluminum plate apply a brake to the magnet.

We see that the magnet oscillates freely.
When an Aluminum plate is placed below it stops quickly.
When a second Aluminum plate is placed on top it reduces the air gap and the magnet comes to a quicker stop because of the Eddy Currents.

This work is supported by IUCAA (www.iucaa.in) and TATA Trust (www.tata.com/aboutus/sub_index/Tata-trusts)

Credits:,Ashok Rupner, Shivaji Mane, Jyoti Hiremath, Arvind Gupta, Vidula Mhaiskar TATA Trust: Education is one of the key focus areas for Tata Trusts, aiming towards enabling access of quality education to the underprivileged population in India. To facilitate quality in teaching and learning of Science education through workshops, capacity building and resource creation, Tata Trusts have been supporting Muktangan Vigyan Shodhika (MVS), IUCAA's Children’s Science Centre, since inception. To know more about other initiatives of Tata Trusts, please visit www.tatatrusts.org