NEET Physics: Questions 73  77 of 2098
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Question number: 73
» 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 % 

Question number: 74
» Physics and Measurement » Accuracy and Precision of Measuring Instruments
Question
The number of significant figures in all the given numbers 25.12, 2009, 4.156 and l. 217 x 10  4 is
Choices
Choice (4)  Response  

a.  2 

b.  3 

c.  4 

d.  1 

Question number: 75
» Kinematics » Motion in a Straight Line
Question
A particle of mass m moves on the xaxis as follows: it starts from rest at t = 0 from the point x  0 and comes to rest at t = 1 at the point x = 1. No other information is available about its motion at intermediate time (0 < t < 1). If a denotes the instantaneous acceleration of the particle, then
Choices
Choice (4)  Response  

a.  A cannot remain positive for all t in the interval 0 < t < l 

b. 
Must be > 4 at some point or points in its path 

c. 
Cannot exceed 2 at any point in its path 

d. 
= 2 at any point in its path. 

Question number: 76
» Physics and Measurement » SI Units
Question
10 the unit of Stefan’s constant a is
Choices
Choice (4)  Response  

a.  Wm ^{2} K ^{4} 

b.  Wm ^{2} K ^{4} 

c.  Wm ^{2} K ^{4} 

d.  Wm ^{2} K ^{1} 

Question number: 77
» Physics and Measurement » Errors in Measurement
Question
A physical parameter a can be determined by measuring the parameters b, c, d and e using the relation a =
If the maximum errors in the measurement of b, c, d and e are b1 %, c1 %, d1 %, and e1 %, then the maximum error in the value of a determined by the experiment is
Choices
Choice (4)  Response  

a.  (b _{1} + c _{1}  d _{1 }  e _{1}) % 

b.  (b _{1} + c _{1} + d _{1 } + e _{1}) % 

c.  (b _{1} + c _{1}  d _{1}  e _{1}) % 

d.  (b_{1} + c _{1} + d_{1} + e_{1}) % 
