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 Physics Questions

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Q:

If an object moves with constant velocity,

A) it must have constant speed B) it must have constant direction
C) it must have constant speed in constant direction D) None of the above
 
Answer & Explanation Answer: C) it must have constant speed in constant direction

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Q:

What is the resistance (in ohm) of an electrical component if a current of 0.1 A passes through it on application of 5 V of potential difference across it?

A) 0.5 B) 100
C) 50 D) 1
 
Answer & Explanation Answer: C) 50

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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 taper on the lathe spindle is

A) 1 in 10 B) 1 in 20
C) 1 in 15 D) 1 in 25
 
Answer & Explanation Answer: B) 1 in 20

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Q:

Materials that usually are good conductors of electricity?

A) Aluminium B) Lead
C) Nickel D) Wood
 
Answer & Explanation Answer: A) Aluminium

Explanation:

Materials that usually allow electricity to pass through them are called Good conductors of electricity.


Conductors conduct electrical current very easily because of their free electrons.

Examples are :: Aluminium, Gold, Copper, Silver

 

Materials that do not allow or oppose electrical current & make poor conductors are called Insulators.

Examples are :: Glass, Plastic, Wood, Air,...

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Q:

What type of electromagnetic radiation is used in the remote control of a television?

A) Ultraviolet B) Visible
C) Infrared D) None of the above
 
Answer & Explanation Answer: C) Infrared

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Q:

Thermohaline circulation is mainly due to

A) cold, dense ocean water sinking and warmer water replacing it B) winds causing circulation of ocean water
C) warmer, less dense water sinking in the ocean and cold water replacing it D) warm water being added to the ocean due to industial waste
 
Answer & Explanation Answer: A) cold, dense ocean water sinking and warmer water replacing it

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Q:

If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is:

A) concave mirror B) convex mirror
C) plano-concave mirror D) plane mirror
 
Answer & Explanation Answer: B) convex mirror

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