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General Knowledge > General Science

WAVES AND MOTIONS MCQs

Laws Of Motion, Second Law Motion, Uniform Circular Motion, First Law Of Motion, Third Law Motion, Horizontal Projectile Motion, Oscillations And Waves, Radio Wave Propagation, Wave Optics

Total Questions : 131 | Page 4 of 14 pages
Question 31. The aim of the above formula is to find?
  1.    displacement
  2.    velocity
  3.    acceleration
  4.    angular velocity
 Discuss Question
Answer: Option B. -> velocity
Question 32. Calculate the time period of a wave with a frequency of 50 Hz
  1.    50 seconds
  2.    5 seconds
  3.    0.2 second
  4.    0.02 second
 Discuss Question
Answer: Option D. -> 0.02 second
Question 33. The aim of the above formula is to find?
  1.    distance
  2.    displacement
  3.    velocity
  4.    acceleration
 Discuss Question
Answer: Option B. -> displacement
Question 34. Why when a bat hits a baseball and when the wind blows past a power line are the example of oscillation?
  1.    the line may oscillate (“gallop” in electrical engineering terms) so severely that it rips apart, shutting off the power supply to a community
  2.    When a bat hits a baseball, the bat may oscillate enough to sting the batter’s hands or even to break apart
  3.    When a bat hits a baseball, the bat may push through the batter’s hands or even break apart and become one
  4.    Both A & B
 Discuss Question
Answer: Option D. -> Both A & B
Question 35. Many oscillations are merely amusing or annoying, but many others are dangerous or financially important
  1.    When a bat hits a baseball
  2.    When the wind blows past a power line
  3.    When an airplane is in flight
  4.    All of above
 Discuss Question
Answer: Option D. -> All of above
Question 36. The speed of radio wave in free space is
  1.    3 x 108 miles/second
  2.    3 x 106 miles/second
  3.    3 x 108 meters/second
  4.    3 x 106 meters/second
 Discuss Question
Answer: Option C. -> 3 x 108 meters/second
Question 37. Radio waves would strongly reflect off
  1.    A flat metallic surface of the right size
  2.    A flat insulating surface of the right size
  3.    A flat dielectric surface of the right size
  4.    A flat body of water
 Discuss Question
Answer: Option A. -> A flat metallic surface of the right size
Question 38. F2 layer of Appleton region acts as a significant reflecting medium for _____ frequency radio waves
  1.    Low
  2.    Moderate
  3.    High
  4.    All of the above
 Discuss Question
Answer: Option C. -> High
Question 39. Which among the following is/are not present in free space?
  1.    Solid bodies
  2.    Ionized particles
  3.    Interference of normal radiation & radio wave propagation
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 40. According to Webster’s dictionary, what is an antenna?
  1.    Impedance matching device
  2.    Sensor of electromagnetic waves
  3.    Transducer between guided wave & free space wave
  4.    Metallic device for radiating or receiving radio waves
 Discuss Question
Answer: Option D. -> Metallic device for radiating or receiving radio waves

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