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⁞ Physics

General Science ➤ Physics ➤ 2
Question 36
Q36.  Which of the following is correct?
 

Answer :  The poles of a magnet always occur in pairs


The poles of a magnet always occur in pairs. Unlike poles attract and like poles repel.
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Question 37
Q37.  What is the susceptibility of a diamagnetic material?
 

Answer :  negative


In terms of the susceptibility χ , a material is diamagnetic if χ is negative, para- if χ is positive and= small, and ferro- if χ is large and positive
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Question 38
Q38.  Which of the following nuclear processes is the source of energy output in the interior of stars?
 

Answer :  Nuclear Fusion


Thermonuclear fusion is the source of energy output in the interior of stars.
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Question 39
Q39.  What are the nuclei of different atoms containing same number of neutrons known as?
 

Answer :  Isotones


Nuclei of different atom containing same number of neutrons are called isotones.
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Question 40
Q40.  Which of the following metal foils was used in the Rutherford’s alpha particle scattering experiment?
 

Answer :  Gold


Rutherford directed beams of alpha particles (which are the nuclei of helium atoms and hence positively charged) at thin gold foil and noted how the alpha particles scattered from the foil.
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