Physics Questions

Q:

Calculate the pressure (in Pa) if a thrust of 1000 N is applied to an area of 5 sq.m.

 

A) 200 B) 50
C) 100 D) 25
 
Answer & Explanation Answer: A) 200

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Q:

Which of the following electromagnetic waves has minimum wavelength?

 

A) Alpha B) Gamma
C) Infrared D) X-rays
 
Answer & Explanation Answer: B) Gamma

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Q:

Which instrument is used to measure humidity?

 

A) Pyrometer B) Hydrometer
C) Hygrometer D) Calorimeter
 
Answer & Explanation Answer: C) Hygrometer

Explanation:

Hygrometer is used for measuring humidity of air.

 

 

 

 

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Q:

Any body kept in a fluid experiences an upward force called _____________.

 

A) torque B) moment
C) pressure D) upthrust
 
Answer & Explanation Answer: D) upthrust

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Q:

Generally atomic radius is measured in which unit?

 

A) Fermi B) Millimeter
C) Angstrom D) Micrometer
 
Answer & Explanation Answer: C) Angstrom

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Q:

____ is not a type of heat transfer.

 

A) Diffusion B) Reflection
C) Convection D) Radiation
 
Answer & Explanation Answer: B) Reflection

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Q:

Fill in the blank with the most appropriate option.

 

18 volts = ___ x 3 ohms

 

A) 6 amperes B) 6 watts
C) 6 milliamperes D) 6 joules
 
Answer & Explanation Answer: A) 6 amperes

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Q:

Calculate the power (in W) of an engine if it can perform 120 J of work in 3 seconds.

 

A) 360 B) 80
C) 180 D) 40
 
Answer & Explanation Answer: D) 40

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