Multiple choice general knowledge The most powerfull Hydrogen Bomb ever detonated is? MOAB FOAB Tsar Bomba Little Boy Reveal answer Fill a bubble to check yourself C Correct answer Explanation Tsar Bomba, detonated by the Soviet Union in 1961, remains the most powerful thermonuclear weapon (hydrogen bomb) ever tested, with a yield of 50 megatons. MOAB and FOAB are conventional bombs, while Little Boy was a fission-based atomic bomb.