Physics and Measurement (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 42  46 of 62
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Passage
The internal radius of a 1 m long resonance tube is measured as 3 cm. A tuning fork of frequency 3500Hz is used. The first resonating length is measured as 14.6 cm and the second resonating length is measured as 24.0 cm.
Question number: 42 (2 of 2 Based on Passage) Show Passage
» Physics and Measurement » Errors in Measurement
Question
Calculate the speed of sound at the room temperature
Choices
Choice (4)  Response  

a.  276 m/s 

b.  675 m/s 

c.  930 m/s 

d.  658 m/s 

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Question number: 43
» Physics and Measurement » Errors in Measurement
Assertion (Ꭺ)
Number of significant figures in 0.005 is one and that in 0.500 is three.
Reason (Ꭱ)
This is because zero is not significant.
Choices
Choice (4)  Response  

a.  Ꭺ is false but Ꭱ is true 

b.  Both Ꭺ and Ꭱ are false 

c.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

d.  Ꭺ is true but Ꭱ is false 

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Question number: 44
» Physics and Measurement » Dimensions of Physical Quantities
Assertion (Ꭺ)
The time period of a pendulum is given by the formula, T = 2π
Reason (Ꭱ)
According to the principle of homogeneity of dimensions, only that formula is correct in which the dimensions of L. H. S. is equal to dimensions of R. H. S.
Choices
Choice (4)  Response  

a.  Ꭺ is true but Ꭱ is false 

b.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

c.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

d.  Ꭺ is false but Ꭱ is true 

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Question number: 45
» Physics and Measurement » SI Units
Question
Wavelength of ray of light is 0.006 m. It is equal to
Choices
Choice (4)  Response  

a.  60 microns 

b.  6 microns 

c.  6000 microns 

d.  All of the above 

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Question number: 46
» Physics and Measurement » Errors in Measurement
Question
If there is a positive error of 50 % in the measurement of velocity of a body, then the error in the measurement of kinetic energy is
Choices
Choice (4)  Response  

a.  25% 

b.  50% 

c.  125% 

d.  75% 

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