Physics Questions

Q:

What is the SI unit of pressure?

A) Newton B) Weber
C) Pascal D) Henry
 
Answer & Explanation Answer: C) Pascal

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Q:

Why metals conduct electricity?

A) Because of low melting point B) Because of high tensile strength
C) Because of free electrons D) Because of high atomic density
 
Answer & Explanation Answer: C) Because of free electrons

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Q:

Which one among the following is not an electro­magnetic wave?

A) X­-Ray B) R­-Ray
C) Cathode Ray D) Infrared Ray
 
Answer & Explanation Answer: C) Cathode Ray

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Q:

Which of the following device is best suited for measuring the temperature inside metallurgical furnaces?

A) Pyrometer B) Thermocouple
C) Thermometer D) Thermistor
 
Answer & Explanation Answer: A) Pyrometer

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Q:

Find the acceleration (in m/s2) of a body which accelerates from 10 m/s to 20 m/s in 4 seconds.

A) 7.5 B) 15
C) 5 D) 2.5
 
Answer & Explanation Answer: D) 2.5

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Q:

Which of the following pairing is incorrect

A) Hygrometer ­- Water vapour content of the atmosphere B) Lactometer - ­ Specific gravity of liquids
C) Anemometer ­ - Speed of the wind D) Seismograph -­ Earthquakes
 
Answer & Explanation Answer: B) Lactometer - ­ Specific gravity of liquids

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Q:

A Sonar of a ship sends sounds waves of speed 1600 m/s. These waves are reflected back by the ocean floor in 4 seconds. Find the depth (in m) of the ocean floor.

 

A) 6400 B) 3200
C) 1600 D) 4800
 
Answer & Explanation Answer: B) 3200

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Q:

The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called ___

A) inertia B) momentum
C) energy D) force
 
Answer & Explanation Answer: A) inertia

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