A solar cell is made up of ______.
silicon
titanium
magnesium
teflon
A solar cell converts ______.
heat energy into electrical energy
solar energy into electrical energy
heat energy into light energy
solar energy into light energy
The scientist who first carried out critical nuclear fission reactionis ______.
Otto Hahn
Enrico Fermi
Hans Bethe
Einstein
The source of energy of the sun is ______.
nuclear fission
chemical reaction
nuclear fusion
photoelectric effect
India exploded her first underground nuclear device at ______.
Kota
Ranchi
Jaipur
Pokhran
Which company launched the first mobile phone?
iPhone
Samsung
Nokia
Motorola
Who invented the mobile phone?
Adrian Girzone
Martin Cooper
Joel Engel
Alexander Graham Bell
What is the nickname for a large, obsolete mobile phone?
Brick
Vodaphone
Radiophone
None of the above
Which one of the following first featured a mobile phone?
Wedding Planner
Who Framed Roger Rabbit
16 Candles
Who invented the camera mobile phone?
William Kelly
Philippe Kahn
Jeremy Watt
Jhon kelen