NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 64  68 of 2142
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Question number: 64
» 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: 65
» Kinematics » Motion in a Straight Line
Question
A particle moves along xaxis as x = 4 (t  3) + a (t  4) ^{2}
Which of the following is true?
Choices
Choice (4)  Response  

a.  The initial velocity of particle is 4 

b.  The particle is at origin at t = 0 

c.  The acceleration of particle is 2a 

d.  All of the above 

Question number: 66
» 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: 67
» Kinematics » Motion in a Straight Line
Question
a particle moving in a straight line covers half the distance with speed of 3 m/s. The other half of the distance is covered in two equal time intervals with speed of 4.5 m/s and 7.5 m/s respectively. The average speed of the particle during this motion is
Choices
Choice (4)  Response  

a.  5.0 m/s 

b.  5.5 m/s 

c.  4.8 m/s 

d.  4.0 m/s 

Question number: 68
» 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% 
