Physics Questions

Q:

A man standing close to the platform at a railway station experiences a pulling force towards a fast moving train because of __________ .

A) gravitational force between train and man B) illusion of the man
C) the centripetal force D) pressure difference due to fast moving air in between
 
Answer & Explanation Answer: D) pressure difference due to fast moving air in between

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Q:

The energy that generates wind comes from what source?

A) Anemometers B) Solar radiation
C) Ocean currents D) None of the above
 
Answer & Explanation Answer: B) Solar radiation

Explanation:

Wind is nothing but the form of moving air. It is caused by the uneven heating of the earth's surface by the sun. Hence, the energy that generates wind comes from solar radiation.

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Q:

An object of 10 kg is moving with a speed of 2 m/s. The kinetic energy of the object is

A) 20 J B) 25 J
C) 10 J D) 40 J
 
Answer & Explanation Answer: A) 20 J

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Q:

Weight of a body is maximum at the:

A) Equator B) Pole
C) Subtropics D) Tropics
 
Answer & Explanation Answer: B) Pole

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Q:

What is the SI unit of frequency?

A) Newton B) Watt
C) Farad D) Hertz
 
Answer & Explanation Answer: D) Hertz

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Q:

The resistance of a conductor is inversely proportional to its:

A) length B) resistivity
C) temperature D) area of cross section
 
Answer & Explanation Answer: D) area of cross section

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Q:

In science a push or pull of an object is called ________.

A) Pick B) Lift
C) Force D) Shut
 
Answer & Explanation Answer: C) Force

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Q:

A ball rolling along the ground gradually slows down and finally comes to rest is due to ________.

A) Friction B) Magnetic force
C) Electrostatic force D) Muscular force
 
Answer & Explanation Answer: A) Friction

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