Physics General Knowledge Questions and Answers

9. The special technique used in ships to calculate the depth of ocean beds is
  A.  Reverberation
  B.  LASER
  C.  Sonic boom
  D.  SONAR
Answer
Ans: D
SONAR
10. A jet engine works on the principle of conservation of
  A.  Energy
  B.  Mass
  C.  Angular momentum
  D.  Linear momentum
Answer
Ans: D
Linear momentum
11. The clouds float in the atmosphere because of their low
  A.  Density
  B.  Temperature
  C.  Velocity
  D.  Pressure
Answer
Ans: A
Density
12. Microwave oven consumes less power due to
  A.  Short wavelength of radiation
  B.  Small frequency of radiation
  C.  Small frequency as well as wavelength of radiation
  D.  Large frequency as well as wavelength of radiation
Answer
Ans: A
Short wavelength of radiation
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