Physics and Measurement (NEET (NTANational Eligibility cum Medical Entrance Test) Physics): Questions 1  5 of 62
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Question number: 1
» Physics and Measurement » Errors in Measurement
Question
The resistance R = V/i where V = 100 + or  5 volts and i = 10 + 0.2 amperes. What is the total error in R?
Choices
Choice (4)  Response  

a.  7 % 

b.  5 % 

c.  5/2 % 

d.  5.2 % 

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Question number: 2
» Physics and Measurement » Errors in Measurement
Question
If the length of rod A is 3.25 + 0.01 cm and that of B is 4.19 + 0.01 cm then the rod B is longer than rod A by
Choices
Choice (4)  Response  

a.  0.94 + 0.00 cm 

b.  0.94 + 0.02 cm 

c.  0.94 + 0.01 cm 

d.  None of the above 

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Question number: 3
» Physics and Measurement » Dimensions of Physical Quantities
Question
A physical quantity x depends on quantities y and z as follows: x = Ay + B tan Cz, where A, B and C are constants. Which of the following do not have the same dimensions?
Choices
Choice (4)  Response  

a.  x and A 

b.  y and B/A 

c.  C and z1 

d.  x and B 

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Question number: 4
» Physics and Measurement » SI Units
Question
The magnitude of any physical quantity
Choices
Choice (4)  Response  

a.  depends on the method of measurement 

b.  does not depend on the method of measurement 

c.  is more in SI system than in CGS system 

d.  directly proportional to the fundamental units of mass, length and time 

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Question number: 5
» Physics and Measurement » Errors in Measurement
Assertion (Ꭺ)
Out of three measurements l = 0.7 m; l = 0.70 m and l = 0.700 m, the last one is most accurate.
Reason (Ꭱ)
In every measurement, only the last significant digit is not accurately known.
Choices
Choice (4)  Response  

a.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

b.  Ꭺ is false but Ꭱ is true 

c.  Both Ꭺ and Ꭱ are false 

d.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

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