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Q:

Which of the following is not a vector quantity?

A) Acceleration B) Electric current
C) Force D) Velocity
 
Answer & Explanation Answer: B) Electric current

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Q:

An object is in static equilibrium when it is _______.

A) at rest B) moving in a circular path
C) moving with uniform velocity D) accelerating at high speed
 
Answer & Explanation Answer: A) at rest

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Q:

What is the SI unit of intensity of sound?

A) Decible B) Newton
C) Heartz D) Tesla
 
Answer & Explanation Answer: A) Decible

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Q:

A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?

A) The liquid surface falls down on the direction of motion and rises up on the back side of the tank B) The liquid surface falls down only at the center of the tank
C) The surface of the liquid remains horizontal D) None
 
Answer & Explanation Answer: A) The liquid surface falls down on the direction of motion and rises up on the back side of the tank

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Q:

Which phenomenon is responsible for the echo of sound wave?

A) Reflection B) Refraction
C) Interference D) Polarisation
 
Answer & Explanation Answer: A) Reflection

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Q:

Sound is a form of ____________ which produces a sensation of hearing in our ears.

A) power B) energy
C) force D) momentum
 
Answer & Explanation Answer: B) energy

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Q:

The time period of a sound wave is 0.01 seconds. Find its frequency (in Hz).

A) 100 B) 10
C) 50 D) 20
 
Answer & Explanation Answer: A) 100

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Q:

Which one of the following statements with regard   to   Jet   stream,   an   upper   level tropospheric wave, is not correct?

A) It is narrow band of high-velocity wind. B) It   follows   the   wave   path   near   the tropopause at elevations of 8 km to 15 km.
C) Jet  streams  are typically  continuous over long distances. D) In summer, the polar front jet achieves its maximum force.
 
Answer & Explanation Answer: B) It   follows   the   wave   path   near   the tropopause at elevations of 8 km to 15 km.

Explanation:

All  are  correct  except  D,  as  Jet streams  are  phenomena  of  winter. It   is   believed   that   jet   stream exercises  an  important  influence on the winter weather in India.

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