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Why are errors expressed as positive and...

Why are errors expressed as positive and negative?

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There are chances of the measured value to be either a little greater or a little less than its actual numerical value if there is any inaccuracy in the measurement of any physical quantity. Hence errors are either expressed as positive or negative.
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KUMAR PRAKASHAN-UNITS AND MEASUREMENT-SECTION -C (OBJECTIVE QUESTIONS (VSQS)
  1. Explain the statement, "The accuracy of the measurement, can be made n...

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

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  3. Why are errors expressed as positive and negative?

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  4. 1 gcm^(-3).... Kgm^(-3) (Fill the gaps)

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

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  6. Write accuracy of atomic clock.

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

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

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  9. Are dimension of mass and weight equal ?

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

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

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

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  13. Which are inferior planets ?

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  14. What is elongation ?

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

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

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

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  18. Light year is unit of …... .

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  19. A physical quantity has unit ("Watt")/(m^(2)) write its dimension.

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  20. y=x^(2)r+M^(1)L^(1)T^(-2) is dimensionally correct. If r represent dis...

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