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 Physics Questions

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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:

An object, starting from rest, moves with constant acceleration of 4 m/s2. After 8 s, its speed is

A) 16 m/s B) 8 m/s
C) 32 m/s D) 4 m/s
 
Answer & Explanation Answer: C) 32 m/s

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Q:

What is the process of conversion of solid state directly to gaseous state called?

A) Evaporation B) Condensation
C) Sublimation D) Distillation
 
Answer & Explanation Answer: C) Sublimation

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Q:

What is the SI unit of Torque?

A) newton/meter B) newton meter
C) newton second D) newton/meter squared
 
Answer & Explanation Answer: B) newton meter

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Q:

The  optical  phenomenon  that  is  primarily responsible  for  the  observation  of  rainbow on a rainy day is 

A) diffraction B) interference
C) dispersion D) reflection
 
Answer & Explanation Answer: C) dispersion

Explanation:

A rainbow is a natural spectrum appearing in the sky after a rain shower. It is caused by dispersion of sunlight by tiny water droplets, present in the atmosphere. A rainbow is always formed in a direction opposite to that of the Sun. The water droplets act like small prisms. They refract and disperse the incident sunlight, then reflect it internally, and finally refract it again when it comes out of the raindrops.

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Q:

What is the noise level of normal conversation?

A) About 60 dB B) About 70 dB
C) About 80 dB D) About 90 dB
 
Answer & Explanation Answer: A) About 60 dB

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Q:

Heat flows as a result of difference of _____.

A) Temperature B) Density
C) mass D) Volume
 
Answer & Explanation Answer: A) Temperature

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Q:

The SI unit of resistance is:

A) Newton B) Coulomb
C) Ohm D) Joule
 
Answer & Explanation Answer: C) Ohm

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