If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then both bodies acquire the same
(A) Velocity
(B) Momentum
(C) Acceleration
(D) Kinetic energy
Correct Answer
Answer: Option B
Of the following properties of a wave, the one that is independent of the other is its
(A) Amplitude
(B) Velocity
(C) Wavelength
(D) Frequency
Correct Answer
Answer: Option A
RADAR is used for
(A) Locating submerged submarines
(B) Receiving signals in a radio receiver
(C) Locating geostationary satellites
(D) Detecting and locating the position of objects such as airplanes
Correct Answer
Answer: Option D
Stars twinkle because
(A) The intensity of light emitted by them changes with time
(B) The distance of the stars from the earth changes with time
(C) The refractive index of the different layers of the earth’s atmosphere changes continuously, consequently the position of the image of a start changes with time
(D) The light from the star is scattered by the dust particles and air molecules in the earth’s atmosphere
Correct Answer
Answer: Option C
Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
(A) Water, iron and air
(B) Iron, air and water
(C) Air, water and iron
(D) Iron, water and air
Correct Answer
Answer: Option C
Light travels at the fastest speed in
(A) Glass
(B) Water
(C) Hydrogen
(D) Vacuum
Correct Answer
Answer: Option D
Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
(A) X-rays
(B) Ultraviolet light
(C) Visible light
(D) Radio waves
Correct Answer
Answer: Option C
Supersonic plane fly with the speed
(A) Less than the speed of sound
(B) Of sound
(C) Greater than the speed of sound
(D) Of light
Correct Answer
Answer: Option C
Primary rainbow is formed when light suffers
(A) Two internal refractions before emerging out of the drop
(B) One internal refraction before emerging out of the drop
(C) No internal refraction
(D) Either one or two internal refractions before emerging out of the drop
