Physics and Measurement (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 31  35 of 62
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 550.00 or
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 

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% 

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% 

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}] 

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 % 
