Physics and Measurement (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 31  35 of 63
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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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Question number: 34
» Physics and Measurement » Dimensions of Physical Quantities
Question
The frequency of vibration of string is given by v = [Fm] ^{1/2} Here P is number of segments in the string and l is the length. The dimensional formula for m will be
Choices
Choice (4)  Response  

a.  [M L ^{0 } T ^{1}] 

b.  [M L ^{1} T ^{0}] 

c.  [M ^{0} L T ^{1}] 

d.  [M ^{0 } L ^{0} T ^{0}] 

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Question number: 35
» Physics and Measurement » Errors in Measurement
Question
The percentage errors in the measurement of mass and speed are 2 % and 3 % respectively. How much will be the maximum error in the estimation of the kinetic energy obtained by measuring mass and speed?
Choices
Choice (4)  Response  

a.  1% 

b.  5 % 

c.  8 % 

d.  11 % 

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