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Units And Measurement

Question

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How does the error combine together in case of addition or subtraction?

Solution

When we add or subtract two or more quantities then maximum absolute error in result is the sum of the maximum absolute errors in each quantity.

Some More Questions From Units and Measurement Chapter

What is measurement?

What is the need of measurement?

Define physical quantity.

Give four examples of physical quantities.

Define unit.

What are the two main required characteristics of a unit?

Can we use same units for different physical quantities?

Can we use different units to measure same physical quantity?

To measure a physical quantity X, the unit U is repeatedly used for n times. What is the magnitude of physical quantity?

Does the numerical factor in the quantitative measurement depend on the system of unit used?

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