Good news on DD News Channel 15 Oct. 2017 by user1 · Published October 16, 2017 · Updated October 16, 2017 Share
Career in Physics | By Chief Scientist Dr. R.K. Kotnala | National Physical Laboratory, New Delhi October 30, 2017 by user1 · Published October 30, 2017
Hydroelectric Cell – Generating energy using water : Dr Kotnala March 27, 2018 by user1 · Published March 27, 2018 · Last modified March 28, 2018
Biggest Indian Invention: Hydroelectric Cell, generates electricity using water July 28, 2017 by user1 · Published July 28, 2017 · Last modified August 11, 2017
