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Error of measurement-MCQ-Basic

Dear Readers,

Physics is an important subject in preparation for various Competitive exams.To keep a track of your preparation we have designed a small quiz of 10 Basic Level Questions on error of measurement. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. 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

  •  11%
  •  8%
  •  5%
  •  1%

5%

Q2. The random error in the arithmetic mean of 100 observations is x; then random error in the arithmetic mean of 400 observations would be

  •  4x
  •  1/4x
  •  2x
  •  1/2x

2x

Q3. What is the number of significant figures in 0.310×103

  •  2
  •  3
  •  4
  •  6

6

Q4. Error in the measurement of radius of a sphere is 1%. The error in the calculated value of its volume is

  •  1%
  •  3%
  •  5%
  •  7%

3%

Q5. The unit of percentage error is

  •  Same as that of physical quantity
  •  Different from that of physical quantity
  •  Percentage error is unit less
  •  Errors have got their own units which are different from that of physical quantity measured

Percentage error is unit less

Q6. The decimal equivalent of 1/20 upto three significant figures is

  •  0.0500
  •  0.05000
  •  0.0050
  •  5.0 × 10-2

0.0050

Q7. If 97.52 is divided by 2.54, the correct result in terms of significant figures is

  •  38.4
  •  38.3937
  •  38.394
  •  38.39

38.4

Q8. Accuracy of measurement is determined by

  •  Absolute error
  •  Percentage error
  •  Both
  •  None of these

Absolute error

Q9. A thin copper wire of length l metre increases in length by 2% when heated through 10ºC. What is the percentage increase in area when a square copper sheet of length l metre is heated through 10ºC

  •  4%
  •  8%
  •  16%
  •  None of the above.

8%

Q10. In the context of accuracy of measurement and significant figures in expressing results of experiment, which of the following is/are correct
(1) Out of the two measurements 50.14 cm and 0.00025 ampere, the first one has greater accuracy
(2) If one travels 478 km by rail and 397 m. by road, the total distance travelled is 478 km.

  •  Only (1) is correct
  •  Only (2) is correct
  •  Both are correct
  •  None of them is correct.

Only (1) is correct



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