AIIMS (All India Institute of Medical Sciences) Physics: Questions 297  301 of 500
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Question number: 297
» Work, Energy and Power » Kinetic Energy
Question
A V – shape is created by joining two same sized roads. The angle between two rods is . If this system is rotating about a line passing through their ends which are joined and perpendicular to their plane, then the work done (W) is –
Choices
Choice (4)  Response  

a.  Maximum for  
b.  Maximum for  
c.  Maximum for  
d.  W is independent of . 
Question number: 298
» Electromagnetic Induction & Alternating Currents » Alternating Currents
Question
In an A. C. circuit containing only inductor, the voltage –
Choices
Choice (4)  Response  

a.  Leads the current by 180°  
b.  Leads the current by 90°  
c.  Lags the current by 90°  
d.  Remains in phase with the voltage 
Question number: 299
» Experimental Skills » Speed of Sound in Air
Question
The speed of sound in a gas at S. T. P. is and the density of the gas is . Find the number of degrees of freedom of a molecule of the gas.
Choices
Choice (4)  Response  

a.  3  
b.  6  
c.  5  
d.  4 
Question number: 300
» Work, Energy and Power » Kinetic Energy
Question
Two bodies with kinetic energies in the ratio of are moving with equal linear momentum. The ratio of their masses is –
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 301
» Atoms and Nuclei » Half Life and Mean Life
Question
A radioactive substance decays to of its initial activity in 20 days. The halflife of the radioactive substance expressed in days is –
Choices
Choice (4)  Response  

a.  8  
b.  12  
c.  2  
d.  6 