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 Physics Questions

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Q:

Alternate freezing and thawing often leads to ______.

A) Creep B) Slumps
C) Mud flows D) Earth flows
 
Answer & Explanation Answer: A) Creep

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Q:

Find arc elasticity of demand, if quantity demanded falls from 1000 to 950 when price of the item is increased from Rs. 240 to Rs. 280?

A) 0.33 B) 0.3
C) -0.3 D) -0.33
 
Answer & Explanation Answer: D) -0.33

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Q:

Electrical Arcing occurs when

Answer

An electric arc is a visible plasma discharge between two electrodes that is caused by electrical current ionizing gasses in the air. Electric arcs occur in nature in the form of lightning.

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Q:

Washing machines and microwave oven are operated by _______________ embedded inside these gadgets.

A) Satellites B) Electronic Device
C) e-books D) Internet
 
Answer & Explanation Answer: B) Electronic Device

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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 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:

What is the resistance (in ohm) of an electrical component if a current of 0.5 A passes through it on application of 20 V of potential difference across it?

A) 10 B) 20
C) 80 D) 40
 
Answer & Explanation Answer: D) 40

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Q:

The angle between the __________and the incident ray is called the angle of incidence.

A) surface B) normal
C) tangent D) reflected ray
 
Answer & Explanation Answer: B) normal

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