Physical Sciences MCQs (Set 1)

46. What is light amplification by stimulated emission of radiation?

  • A. Solar energy
  • B. Laser
  • C. Plasma
  • D. Cosmic rays
View Answer
Correct Answer:
B. Laser

Explanation:
……

47. Which of the following has more speed?

  • A. Light
  • B. Sound
  • C. Train
  • D. Water
View Answer
Correct Answer:
A. Light

Explanation:
……

48. The capacity of a body to do work is known as __________.

  • A. Energy
  • B. Power
  • C. Momentum
  • D. Strength
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Correct Answer:
A. Energy

Explanation:
……

49. What is the S.I unit of heat energy?

  • A. Joule
  • B. Kelvin
  • C. Candela
  • D. Ampere
View Answer
Correct Answer:
A. Joule

Explanation:
……

50. Microphone is a device which transforms the ______________.

  • A. sound signal into current signal
  • B. current signal into sound signal
  • C. sound signal into light signal
  • D. light signal into sound signal
View Answer
Correct Answer:
A. sound signal into current signal

Explanation:
……

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