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Thursday, 02 April 2026
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Physics Past Questions and Answers

Physics Questions

Question 681:
A block of ice floats on water inside a container. If the block of ice gets completely melted, the level of water in the container will
  • A Increase
  • B Remain the same
  • C Decrease
  • D First decrease and then increase
View Answer & Explanation
Question 682:
The space between the double glass walls of a thermos flask is evacuated space are silvered. The residual source of heat loss takes place by
  • A Convection
  • B Radiation from the surface
  • C Conduction through the stopper and the glass
  • D Conduction across the walls
View Answer & Explanation
Question 683:
The equation of a wave is y = 0.005 sin[x(0.5X - 200t)] where x and y are in meters and t is in seconds. What is the velocity of the wave?
  • A 4000ms-1
  • B 400ms-1
  • C 250ms-1
  • D 40ms-1
View Answer & Explanation
Question 684:
Which of the following characteristics of a wave is used in the measurement of the depth of the sea?
  • A Diffraction
  • B Interference
  • C Refraction
  • D Reflection
View Answer & Explanation
Question 685:
A note is the octave of another note if it has
  • A A frequency twice that of the first note
  • B Frequency half that of the first note
  • C The same fundamental frequency as the first one
  • D A frequency frequency eight times that of the first note
View Answer & Explanation