Questions

Q:

Rate of change of displacement is known as ............

A) Acceleration B) Velocity
C) Speed D) Distance
 
Answer & Explanation Answer: B) Velocity

Explanation:
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Q:

A bullet of mass 10gm is fired with a velocity of 40 m/s from a gun of mass 8 kg. Find the recoil velocity (in m/s) of the gun.

A) 2 B) 0.1
C) 4 D) 0.05
 
Answer & Explanation Answer: D) 0.05

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Q:

Temperature of distant luminous bodies can be determined by

A) Mercury thermometers B) Gas thermometers
C) Pyrometers D) Colour thermometers
 
Answer & Explanation Answer: C) Pyrometers

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Q:

For an ideal gas, which one of the following statements does not hold true?

A) The speed of all gas molecules is same B) The kinetic energies of all gas molecules are not same
C) The potential energy of the gas molecules is zero D) There is no interactive force between the molecules.
 
Answer & Explanation Answer: A) The speed of all gas molecules is same

Explanation:

In an ideal gas, at any particular time, different particles in the gas have different speeds and hence different kinetic energies. This assumption is reasonable because as the particles collide, we expect their speed to change. Even if initial speed of all the particles was same, the molecular collisions will disrupt this uniformity.Hence statement 1 is incorrect and 2 is correct.

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Q:

Data collected to date indicate that

A) New species of bacteria may be discovered in wild animals. B) Humans and marine mammals cannot be infected by the same pathogens.
C) Marine mammals do not get infectious diseases D) None of the above
 
Answer & Explanation Answer: D) None of the above

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Q:

What are the various components of a computer system?

Answer

1.The hardware


2.The operating system


3.The application programs


4.The users.

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Q:

When was World Meterological Organisation estabilished?

A) 1950 B) 1952
C) 1956 D) 1949
 
Answer & Explanation Answer: A) 1950

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Q:

What did Sir William Herschel discover in 1800?

A) Ultraviolet rays B) Infra-red radiation
C) X rays D) Microwaves
 
Answer & Explanation Answer: B) Infra-red radiation

Explanation:

Sir William Herschel discovered Infra-red radiation in 1800.

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