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Due to wrong calibration, thermometer measures boiling point of water 104 °C rather than 100 °C . The error introduced here is 


1. Random error
2. Instrumental error
3. least count error
4. Error dur to parallax

1 Answer

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Best answer
Correct Answer - Option 2 : Instrumental 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:

  • As the thermometer measures the boiling point of water 104 °C rather than 100 °C, the error introduced here is called instrumental error. 
    • Because of wrong calibration or imperfect design of the measuring instrument. 
  • Instrumental errors occur due to wrong calibration or imperfect design of the measuring instrument. 
  • 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.
  • Error due to parallax occurs when our eyes make an angle with the measurement markings. This results in wrong readings.

Hence option 2) is correct.

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