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Q:

Momentum is measured as the product of :

A) Mass and inertia B) Mass and force
C) Mass and velocity D) Mass and acceleration
 
Answer & Explanation Answer: C) Mass and velocity

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Q:

Meter in a vehicle that calculates distance covered by the vehicle is called __________.

A) Speedometer B) Odometer
C) Thermometer D) Kilometre
 
Answer & Explanation Answer: B) Odometer

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Q:

What is the name of the device used to convert alternating current into direct current ?

A) Ammeter B) Galvanometer
C) Rectifier D) Transformer
 
Answer & Explanation Answer: C) Rectifier

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Q:

Nautical miles is a unit of distance used in

A) Navigation B) Road mile
C) Astronomy D) Measuring the boundaries of a nation
 
Answer & Explanation Answer: A) Navigation

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Q:

The shortest distance measured from the initial to the final position of an object is known as the _________________.

A) motion B) direction
C) velocity D) displacement
 
Answer & Explanation Answer: D) displacement

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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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Q:

In projectile motion, the total flight time is _______.

A) equal to the time required to reach the maximum height B) thrice the time required to reach the maximum height
C) four times the time required to reach the maximum height D) twice the time required to reach the maximum height
 
Answer & Explanation Answer: D) twice the time required to reach the maximum height

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Q:

The force which makes a vehicle to stop when break is applied is called

A) gravitational force B) vander­walls force
C) frictional force D) co­valant force
 
Answer & Explanation Answer: C) frictional force

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