NTPC CBT-2 Physics Quiz - 58

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Question 1:

Radio waves, microwaves, infra-red spectrum, ultraviolet rays, X-rays and gamma rays are classified as ______.

Question 2:

Which one of the following instruments is used to study dispersion of light?

Question 3:

A falling drop of rain water ac-quires the spherical shape due to  ?

Question 4:

The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as–

Question 5:

In the absence of an ozone layer, Which rays will enter the atmosphere?

Question 6:

What does the term LASER stand for?

Question 7:

The LED is a P-N junction diode that produces light as it passes via an electric current in the forward path. What does abbreviation LED stand for?

Question 8:

Nuclear fission is the subdivision of a heavy atomic nucleus. Which statement is not associated with nuclear fission?

Question 9:

Which of the following is the application of sciences such as physics, chemistry, biology, computer science and engineering to matters of law and to the identification of various facts of civilian investigation?

Question 10:

Which of the following is a process in which hot, less dense materials rise upward and are replaced by colder, more dense materials?