New Delhi: Tsar Bomba was developed by the Soviet Union, the bomb was originally designed to have a yield of about 100 megatons of TNT; however, the bomb yield was reduced by half in order to limit the amount of nuclear fallout that would result.
One bomb was built and tested on October 30, 1961, in the Novaya Zemlya archipelago.
It is also known as Big Ivan.
It was a three-stage hydrogen bomb with a yield of about 50 megatons (Mt).