Physics Questions

Q:

Which of the following is an example of thermoplastics?

A) Bakelite B) Melamine
C) PVC D) No option is correct
 
Answer & Explanation Answer: C) PVC

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Q:

Sextant is an instrument used in which of the following ?

A) Gynaecology B) Navigation
C) Birth control D) Medical treatment
 
Answer & Explanation Answer: B) Navigation

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Q:

What is the unit of the physical quantity Entropy?

A) watt per kelvin B) newton per kelvin
C) pascal per kelvin D) joule per kelvin
 
Answer & Explanation Answer: D) joule per kelvin

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Q:

An example of longitudinal waves (in gas as a medium) is ______.

A) heat waves B) radio waves
C) electromagnetic waves D) sound waves
 
Answer & Explanation Answer: D) sound waves

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Q:

________________ refers to the superposing of two or more coherent waves to produce regions of maxima and minima in space, according to the principle of superposition.

A) Interference B) Rectification
C) Intensity D) Diffraction
 
Answer & Explanation Answer: A) Interference

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Q:

An anemometer measures which of the following ?

A) Speed of light B) Speed of wind
C) Speed of water current D) Speed of satellites
 
Answer & Explanation Answer: B) Speed of wind

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Q:

Which  one  of  the following  is  the  value  of one nanometer?

A) 10-7 cm B) 10-6 cm
C) 10-4  cm D) 10-3  cm
 
Answer & Explanation Answer: A) 10-7 cm

Explanation:

1 nanometer (nm) of length

Equals: 0.00000010 centimetres (cm) in length.

This is equal to 10^-7 cm.

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Q:

Weight (W) of a body can be given by the formula

A) W = mv B) W = mf
C) W = ms D) W = mg
 
Answer & Explanation Answer: D) W = mg

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