Physics and Measurement (NEET (NTANational Eligibility cum Medical Entrance Test) Physics): Questions 28  33 of 62
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Question number: 28
» Physics and Measurement » SI Units
Question
What is the relationship between dyne and newton of force?
Choices
Choice (4)  Response  

a.  l dyne = 107 newton 

b.  1 dyne = 10^{7} newton 

c.  l dyne = 105 newton 

d.  1 dyne = 10  5 newton 

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Question number: 29
» Physics and Measurement » Technology and Society
Question
Which of the following pairs is wrong?
Choices
Choice (4)  Response  

a.  TemperatureThermometer 

b.  PressureBarometer 

c.  Relative densityPyrometer 

d.  EarthquakeSeismograph 

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Question number: 30
» Physics and Measurement » SI Units
Question
SI unit of permittivity is
Choices
Choice (4)  Response  

a.  C ^{1} m ^{2} N ^{2} 

b.  C ^{2} m ^{2} N ^{2} 

c.  C ^{2} m ^{2} N ^{2} 

d.  C ^{2} m ^{2} N ^{1} 

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Question number: 31
» Physics and Measurement » Dimensions of Physical Quantities
Question
If the time period (T) of vibration of a liquid drop depends on surface tension (S), radius (r) of the drop and density (ρ) of the liquid, then the expression of T is
Choices
Choice (4)  Response  

a.  T = k 

b.  T = k 

c.  T = k 

d.  None of the above 

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Question number: 32
» Physics and Measurement » Errors in Measurement
Question
Error in the measurement of radius of a circle is 1%. The error in the calculated value of its area is
Choices
Choice (4)  Response  

a.  3% 

b.  2% 

c.  7% 

d.  1% 

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Question number: 33
» Physics and Measurement » Errors in Measurement
Question
A physical quantity A is related to four observable a, b, c and d as follows, A =
the percentage errors of measurement in a, b, c and d are 1%, 3%, 2 % and 2 % respectively. What is the percentage error in the quantity A?
Choices
Choice (4)  Response  

a.  14% 

b.  7% 

c.  5% 

d.  12% 

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