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 Physics Questions

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Q:

Rectifiers convert _____.

A) high voltage to low voltage B) low voltage to high voltage
C) AC to DC D) DC to AC
 
Answer & Explanation Answer: C) AC to DC

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Q:

If a ball is thrown vertically upwards with a velocity of 40 m/s, then what will be the magnitude of its displacement after 6 s?

A) 80 m B) 40 m
C) 60 m D) 20 m
 
Answer & Explanation Answer: C) 60 m

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Q:

Air moves from the region where the air _____________________________.

A) humidity is high to the region where the humidity is low B) pressure is low to the region where the pressure is high
C) pressure is high to the region where the pressure is low   D) humidity is low to the region where the humidity is high  
 
Answer & Explanation Answer: C) pressure is high to the region where the pressure is low  

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Q:

If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is same as that of earth and radius is half as that of earth is _________________.

 

A) 2g B) g/4
C) g/2 D) 4g
 
Answer & Explanation Answer: D) 4g

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Q:

Why is weightlessness experienced while orbiting the earth in space ships ?

A) Inertia B) Acceleration
C) Zero gravity D) Orbital motion
 
Answer & Explanation Answer: C) Zero gravity

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Q:

Cryogenics is a branch of Physics that deal with ______.

A) very high temperatures B) very low temperatures
C) growth of extremely small crystals D) growth of extremely large crystals
 
Answer & Explanation Answer: B) very low temperatures

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Q:

If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is half of that of earth and radius is same as that of earth is _________________.

 

A) g/2 B) 4g
C) 2g   D) g/4
 
Answer & Explanation Answer: A) g/2

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Q:

The functioning of a very old model pendulum clock was completely

A) Mechanical B) Mechanical and electrical
C) Electrical D) Battery operated
 
Answer & Explanation Answer: A) Mechanical

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