NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1681  1686 of 2320
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Question number: 1681
» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring
Question
A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then the short piece will have a force constant of
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 1682
» Electronic Devices » Semiconductors
Question
The energy gap for diamond is nearly
Choices
Choice (4)  Response  

a.  1 eV  
b.  4 eV  
c.  6 eV  
d.  2 eV 
Question number: 1683
» Electronic Devices » Semiconductors
Question
The intrinsic semiconductor becomes an insulator at
Choices
Choice (4)  Response  

a.  0°C  
b.  300 K  
c.  0 K  
d.  100°C 
Question number: 1684
» Electronic Devices » Semiconductor Diode
Question
A piece of copper and the other of germanium are cooled from the room temperature to 80 K, then which of the following would be wrong statements?
(1) Resistance of each Increase
(2) Resistance of each Decrease
(3) Resistance of copper increases while that of germanium decreases
(4) Resistance of copper decreases while that of germanium increases
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  1 and 2 are correct  
b.  2 and 4 are correct  
c.  1,2 and 3 are correct  
d.  1 and 3 are correct 
Question number: 1685
» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring
Question
A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then the long piece will have a force constant of
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 1686
» Oscillations and Waves » Simple Harmonic Motion » Energy
Question
Assertion (Ꭺ)
The graph of total energy of a particle in SHM w. r. t, position is a straight line with zero slope.
Reason (Ꭱ)
Total energy of particle in SHM remains constant throughout its motion.
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ  
b.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ  
c.  Ꭺ is false but Ꭱ is true  
d.  Ꭺ is true but Ꭱ is false 