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Percentage error is calculated using-
1. Absolute error
2. Instrumental error
3. Least count error
4. Relative error

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Best answer
Correct Answer - Option 4 : Relative error

CONCEPT:

  • Error: It is the Uncertainty in measurement by any measuring instrument.
  • Error in measurement can be broadly classified as:
  1. Systematic errors
  2. Random errors.
  • Systematic errors are those that tend to be in one direction, either positive or negative.
  • Random errors are those errors that occur irregularly and are random with respect to sign and shape.
  • The least count error is basically associated with the resolution of the instrument.


EXPLANATION:

The percentage error is calculated using relative error:

Percentage error = Relative error × 100

  • The relative error is the ratio of mean absolute error to the mean value of the quantity measured.
  • Absolute error is the magnitude of difference between individual measurement and the true value of the quantity being measured.
  • The least count error is basically associated with the resolution of the instrument.
  • Instrumental errors occur due to wrong calibration or imperfect design of the measuring instrument. 


Hence option 4) is correct.

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