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General Science Objective Questions and Answers | GK for SSC Data Entry Operator Exam

21 In a filament type light bulb most of electric power consumed appears as :
A LED light
B Infra red rays
C Ultra violet rays
D Fluorescent light

Answer: Option [B]
22 The purpose of using Diode is :
A amplification
B purification
C modulation
D demodulation

Answer: Option [B]
23 What is the minimum escape velocity of rocket to be launched into space ?
A 4KM/Sec
B 8KM/Sec
C 11KM/Sec
D 13KM/Sec

Answer: Option [C]
24 Who invented Electron Microscope ?
A Galileo
B Knoll and Ruska
C Robert Koch
D Leeuwenhook

Answer: Option [B]
25 What is the wavelength of visible spectrum ?
A 1300A0 - 3000A0
B 3900A0 - 7600A0
C 7800A0 - 8000A0
D 8500A0 - 9800A0

Answer: Option [B]


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