Physics Questions

Q:

The unit of measurement of noise is

A) Decibel B) Hertz
C) Amplifier D) Acoustics
 
Answer & Explanation Answer: A) Decibel

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Q:

____________________is a measure of the actual amount of water vapour in a particular sample of air: measured as a partial pressure.

A) Specific Humidity B) Absolute Humidity
C) Relative Humidity D) Dew Point
 
Answer & Explanation Answer: B) Absolute Humidity

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Q:

A wooden block of mass m1 kg accelerates at m/s when a force of 5 N acts on it. Another block of mass m2 kg accelerates at 20 m/s when the same force acts on it. If both the blocks are tied together and the same force acts on their combination, the acceleration will be about

 

A) 6.67 m/s2 B) 1.67 m/s2
C) 5.67 m/s2 D) 4.67 m/s2
 
Answer & Explanation Answer: A) 6.67 m/s2

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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:

When a number of resistors are connected in series in a circuit, the value of current:

A) increases B) becomes half
C) decreases D) remains the same
 
Answer & Explanation Answer: D) remains the same

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Q:

Fuse wire is made of an alloy of

A) Tin and Lead B) Tin and Copper
C) Lead and Copper D) Copper and Silver
 
Answer & Explanation Answer: A) Tin and Lead

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Q:

What is the unit of the physical quantity "Magnetic field strength"?

A) joule per meter B) newton per meter
C) kelvin per meter D) ampere per meter
 
Answer & Explanation Answer: D) ampere per meter

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