Physics and MeasurementErrors in Measurement (NEET Physics): Questions 1  5 of 29
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: 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 % 

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 

Question number: 3
» 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 

Question number: 4
» Physics and Measurement » Errors in Measurement
Question
The period of oscillation of a simple pendulum is given by T = 2π
where l is about 100 cm and is known to have l mm accuracy. The period is about 2s. The time of 100 oscillations is measured by a stopwatch of least count 0.1s. The percentage error in g is
Choices
Choice (4)  Response  

a.  0.8% 

b.  0.1% 

c.  1% 

d.  0.2% 

Question number: 5
» Physics and Measurement » Errors in Measurement
Question
The random error in the arithmetic mean of 100 observations is x; then random error in the arithmetic mean of 400 observations would be
Choices
Choice (4)  Response  

a.  4x 

b.  2 x 

c.  0.25 x 

d.  0.5x 
