Questions

Q:

If a body is whirled in a circle, then the work done on it ___.

A) is zero B) is positive
C) cannot be determined D) is negative
 
Answer & Explanation Answer: A) is zero

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Q:

Boiling point of water is ___.

A) 210 deg F B) 212 deg F
C) 214 deg F D) 208 deg F
 
Answer & Explanation Answer: B) 212 deg F

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Q:

The planet Mars is also known as the ____.

A) Morning star B) Evening star
C) Red planet D) Blue planet
 
Answer & Explanation Answer: C) Red planet

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Q:

Which Metro Rail Corporation will lay vibration-absorbing tracks for the first time in India?

A) Mumbai Metro Rail Corporation B) Noida Metro Rail Corporation
C) Kolkata Metro Rail Corporation D) Delhi Metro Rail Corporation
 
Answer & Explanation Answer: A) Mumbai Metro Rail Corporation

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Q:

Calculate the time period (in seconds) of a sound wave of wavelength 5m travelling with a speed of 500 m/s.

 

A) 0.01 B) 2500
C) 0.02 D) 1250
 
Answer & Explanation Answer: A) 0.01

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Q:

During the free fall of the object, the decrease in potential energy, at any point in its path, appears as an equal amount of increase in _________________.

 

A) kinetic energy B) work done
C) heat energy D) gravitational force
 
Answer & Explanation Answer: A) kinetic energy

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Q:

An echo is returned in 3 s. What is the distance of the reflecting surface from the source, considering the speed of sound as 342 ms-1?

 

A) 513 m B) 644 m
C) 342 m D) 171 m
 
Answer & Explanation Answer: A) 513 m

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Q:

‘Desert Knight-21’, is the Military exercise between India and

A) France B) China
C) United States of America D) Brazil
 
Answer & Explanation Answer: A) France

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