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Q:

Which of the following are not pastoral nomads?

A) Pygmies B) Kazaks
C) Masai D) Lapps
 
Answer & Explanation Answer: A) Pygmies

Explanation:

The pygmies are hunting nomads

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Filed Under: World Geography

Q:

No current will flow between two charged bodies if they have the same 

A) resistance B) charge
C) potential D) charge/ potential ratio
 
Answer & Explanation Answer: C) potential

Explanation:

An electric charge always flows from a body at higher potential to a body at a lower potential irrespective of the amounts of charges contained in them. In the question , no current flows. So there is no potential difference. 

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Filed Under: Physics

Q:

When two similar sources vibrate with slightly different frequencies , a regular rise and fall occurs in the loudness of tone. This phenomenon is known as 

A) doppler effect B) beats
C) resonance D) echo
 
Answer & Explanation Answer: B) beats

Explanation:

Beats means the periodic increase and decrease in loudness heard when two notes of nearly the same frequency are sounded simultaneously.

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Filed Under: Physics

Q:

The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because  

A) the ringing is not loud enough B) the glass of the bell jar absorbs the sound waves
C) the bell jar is too small D) there is no air or any other gas in the bell jar
 
Answer & Explanation Answer: D) there is no air or any other gas in the bell jar

Explanation:

As there is no medium inside the bell jar, sound cannot travel

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Filed Under: Physics

Q:

When one enters a dark room after being in bright light one is not able to see anything clearly for a while because

A) the retina of the eye moves forward B) the retina of the eye moves backward
C) the iris is unable to dilate the pupil immediately to be able to see things D) the eye has no power of accommodation
 
Answer & Explanation Answer: C) the iris is unable to dilate the pupil immediately to be able to see things

Explanation:

The size of the pupil of the eye automatically adjusts itself  according to the intensity of light passing through it;if the intensity is more , the size is less, if less, it is more. So in our case the pupil should dilate i.e, increase in size to be able to see in the dark . This switchover takes sometime. But here the entry into the dark room is immediate . So the eye has no time to adjust itself and hence is not able to see at all for a while.

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Filed Under: Physics

Q:

When a steel ball is placed on the surface of mercury, it does not sink because

A) of the surface tension of mercury B) mercury is a semisolid
C) of the high viscosity of mercury D) the density of mercury is greater than that of steel
 
Answer & Explanation Answer: D) the density of mercury is greater than that of steel

Explanation:

A solid sinks in a liquid if its density is greater than that of the liquid. if less, it floats

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Filed Under: Physics

Q:

Who is the veteran communist leader and CM of West Bengal for a record five consecutive tems until Nov 2000?

Answer

Jyoti Basu

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Subject: Famous Personalities

Q:

Who is the Italian avant-grade-motion-picture director and screen-writer whose films are known for their haunting images of human isolation?

Answer

Michelangelo Antonioni

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Subject: Famous Personalities