Velocity of sound in vacuum is ____________________?
Velocity of sound in vacuum is ____________________?
A. 332 ms-1
B. 320 ms-1
C. Zero
D. 224 ms-1
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In an electronic transition atom cannot emit______________?
In an electronic transition atom cannot emit______________?A. γ-rays
B. Infra red radiation
C. Visible light
D. Ultraviolet raysSteradian is the SI unit of________________?
Steradian is the SI unit of________________?A. Plane angle
B. Solid angle
C. Both plane angle and solid angle
D. Neither plane angle nor solid angleBy how many times are the Electrostatic forces stronger than the Gravitational Forces for a fixed distance?
By how many times are the Electrostatic forces stronger than the Gravitational Forces for a fixed distance?A. 102
B. 1036
C. 1012
D. None of theseZero error of the instrument is a type of_________________?
Zero error of the instrument is a type of_________________?A. Random error
B. Personal error
C. Systematic error
D. Classified errorA stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe _____________________?
A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe _____________________?A. always an node in formed
B. always an antinode is formed
C. neither node nor antinode is formed
D. sometimes a node and sometimes an antinode is formedMany of the semi conductors are crystals of the type__________________?
Many of the semi conductors are crystals of the type__________________?A. Face centred cubic
B. Body centred cubic
C. Simple cubic
D. All of the above