state gov TNPSC Group 2/2A (தமிழ்நாடு) Mock Test 2024 General Knowledge Science Technology and Inventions
What device did John Ambrose Fleming invented in 1904 that helped make radio, television, telephone and even early electronic computers possible?
1
Voltaic pile
2
Oscillation valve
3
Point-contact transistor
4
Electrodynamometer