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Explain the statement, "The accuracy of ...

Explain the statement, "The accuracy of the measurement, can be made not by absolute error but by percentage error only.

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Suppose the length of two different objects measured by the same Vernier Calipers are `+-0.1 cm and 8.05 +-0.01`respectively.
Here the absolute error (0.01 cm.) is same in both the measurements.
Percentage error in first measurement `=(0.01)/(2.20)xx100%xx100%=0.12%`
Hence absolute error being same for both measurements, still the percentage error in larger measurement is small and smaller measurement is large. Hence it can be said that if percentage error is smaller then that measurement is more accurate.
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KUMAR PRAKASHAN-UNITS AND MEASUREMENT-SECTION -C (OBJECTIVE QUESTIONS (VSQS)
  1. Explain accuracy and precision in measurement.

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  2. State difference of mass and weight.

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  3. Explain the statement, "The accuracy of the measurement, can be made n...

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  4. It is advantageous to use the device having smaller value of least cou...

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  5. Why are errors expressed as positive and negative?

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  6. 1 gcm^(-3).... Kgm^(-3) (Fill the gaps)

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  7. Why quantities appearing with higher (power) exponent should be measu...

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  8. Write accuracy of atomic clock.

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  9. If f=x^(2) then what will be relative error in measurement of f ?

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  10. Write six physical quantities which have dimension of M^(1)L^(2)T^(-2)

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  11. Are dimension of mass and weight equal ?

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  12. Write physical quantity having dimension of Nm^(-1)s^(2).

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  13. Is it possible that physical quantity has dimension but do not have mo...

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  14. Explain supplementary quantities and their unit of SI system.

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  15. Which are inferior planets ?

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  16. What is elongation ?

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  17. In modern times which method is used to measure the distance between t...

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  18. "Fundamental unit of length is kilometer and fundamental unit of mass ...

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  19. x=a+bt+ct^(2)=x in metre and tis in sec then write unit of a, b, c.

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  20. Light year is unit of …... .

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