MAGNETIC ROTATION – EULER’S DISC | Telugu
Channel: Arvind Gupta
Date: 06/01/2017

Enjoy the fascinating motion of the strong Neodymium Magnets and the steel Rod. To perform this unusual experiment you need two Neodymium magnets – one ring, other cylindrical, one glass sheet and a 12-cm steel rod. Stick the steel rod to the cylindrical magnet. Place the ring magnet on top of the glass sheet. Stick the other magnet and rod to it from below. Now give the rod a twirl. The rod will keep twirling for a very long time.
A spinning disc on a flat surface is sometimes called Euler’s Disc – named after the Swiss mathematician and Leonard Euler. The secret to this unusual motion is the very low energy loss due to friction. Like the Magnetically Levitated Train a small amount of energy produces a very large amount of motion.
An object in motion tends to remain in motion unless operated by an external force. It would remain in motion were it not for air friction and gravity pulling it against the attraction of the other magnet. The rod speeds up because of CONSERVATION OF MOMENTUM. As the rotational diameter of the rod decreases its speed of spin increases like an Ice Skating Spinner.

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

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

Credits:,Ashok Rupner, Manish Jain, Pradnya Pujari, Shivaji Mane, Jyoti Hiremath, Arvind Gupta, Vidula Mhaiskar

Dubbed in Telugu by Sri Prakash Vidyaniketan