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Q:

The force ultimately responsible for mass movement

A) erosion B) gravity
C) deposition D) weathering
 
Answer & Explanation Answer: B) gravity

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Q:

A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/sq.s)

A) 0J B) 200J
C) 400J D) 100J
 
Answer & Explanation Answer: A) 0J

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Q:

 During the night, the direction of the wind would be from the __________________.

A) valleys to the mountains   B) mountains to the valleys
C) land to the sea D) sea to the land
 
Answer & Explanation Answer: C) land to the sea

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Q:

Why boiling point of water decreases at high altitudes?

A) Because of high temperature B) Because of low atmospheric pressure
C) Because of low temperature D) Because of high atmospheric pressure
 
Answer & Explanation Answer: B) Because of low atmospheric pressure

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Q:

Propagation of sound can be visualised as propagation of ____________ variations in the medium

A) elasticity B) viscosity
C) density D) porosity
 
Answer & Explanation Answer: C) density

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1 1369
Q:

A  photon  of  X-ray  has  energy  of  1  keV.  A photon of visible radiation has energy of 3 eV.  In  this  context,  which  one  of  the following statements is not correct?

A) The wavelength of X-ray photon is less than the wavelength of visible radiation photon. B) Both    the    photons    have    different energies.
C) The  speeds  of  both  the  photons  in vacuum are different D) The   frequency   of   X-ray   photon   is higher  than  the  frequency  of  visible radiation photon.
 
Answer & Explanation Answer: C) The  speeds  of  both  the  photons  in vacuum are different

Explanation:

The speed of all the electromagnetic radiation are always   same   and   equal   to   the numerical value 3 x 10^8m/sec.

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Q:

Which of the following is NOT an application of Fiber optics?

A) Power Generation B) Computer Networking
C) Sensors D) Power Transmission
 
Answer & Explanation Answer: A) Power Generation

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Q:

Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.

A) 12500 B) 20
C) 40 D) 6250
 
Answer & Explanation Answer: B) 20

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