Physical World & Units - Errors & Measurements

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Q1. What is the absolute error in a measurement? (2021)

Solution:

Absolute error is defined as the difference between the measured value and the true value.

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Q2. What is the value of the gravitational constant (G) in SI units? (2023)

Solution:

The gravitational constant (G) is 6.67 x 10^-11 N m²/kg².

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Q3. Which of the following represents the concept of significant figures? (2023)

Solution:

Significant figures include all non-zero digits and any zeros between them or trailing after a decimal point.

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Q4. If a measurement is accurate but not precise, what does it imply? (2019)

Solution:

Accuracy refers to how close a measurement is to the true value.

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Q5. What is the unit of measurement for electric current? (2019)

Solution:

The SI unit of electric current is the Ampere (A).

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Q6. If a measurement is accurate, it means: (2019)

Solution:

Accuracy refers to how close a measured value is to the true value.

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Q7. If a measurement has a relative error of 5%, what does this indicate? (2022)

Solution:

A relative error of 5% indicates that the measurement is off by 5% of the true value.

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Q8. In a measurement, if the error is systematic, what can be said about the results? (2020)

Solution:

Systematic errors lead to biased results, consistently deviating from the true value.

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Q9. What is the error called that occurs due to the limitations of the measuring instrument? (2023)

Solution:

Instrumental error occurs due to the limitations of the measuring instrument.

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Q10. What is the significance of significant figures in measurements? (2019)

Solution:

Significant figures indicate the precision of a measurement, reflecting the certainty of the digits.