Home ≫ General Knowledge ≫ Physics ≫ Page 3
21. A bomb explodes on the moon, You will hear its sound on earth after___________.
  A.  20 minutes
  B.  You can't hear the sound of explosion
  C.  3.7 hours
  D.  2 hours 20 minutes
     
   
View Answer

22. Why does a cannon recoil after firing?
  A.  Newton's third law of motion
  B.  Conservation of energy
  C.  Backward thrust of gases produced
  D.  Newton's first law of motion
     
   
View Answer

23. Which of the following has the lowest frequency?
  A.  Ultra violet rays
  B.  Gamma Rays
  C.  X-rays
  D.  Visible light
     
   
View Answer

24. Which one among the following is not an electromagnetic wave?
  A.  X-ray
  B.  R-Ray
  C.  Cathode Ray
  D.  Infrared Ray
     
   
View Answer

25. Fuse wire is made of an alloy of
  A.  Tin and Copper
  B.  Tin and Lead
  C.  Lead and Copper
  D.  Copper and Silver
     
   
View Answer

26. Every hot object emits___________.
  A.  X-rays
  B.  Visible light
  C.  Infrared rays
  D.  Ultraviolet rays
     
   
View Answer

27. The force which makes a vehicle to stop when break is applied is called
  A.  Gravitational force
  B.  Vanderwalls force
  C.  Covalant force
  D.  Frictional force
     
   
View Answer

28. Flemings "Left hand Rule" is associated with the effect of
  A.  Electric field on current
  B.  Magnetic Field on currrent
  C.  Electric field on magnet
  D.  Magnetic field on magnet
     
   
View Answer

29. The frequency of direct current is:
  A.  Zero
  B.  50 HZ
  C.  60HZ
  D.  100HZ
     
   
View Answer

30. Kinetic energy depends on
  A.  The velocity or speed of the moving body
  B.  the mass of the moving body
  C.  both mass and velocity of the moving body
  D.  the pressure of the moving body
     
   
View Answer

Copyright © 2020-2022. All rights reserved. Designed, Developed and content provided by Anjula Graphics & Web Desigining .