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Units And Measurement

Question

Wired Faculty App

Which of the following measurements are not done by screw gauge:

0.3200cm, 5.4cm, 1.22cm, 0.00005mm

Solution

The measurements which do not require us to use screw gauge are 0.3200 cm, 5.4 cm and 1.22 cm.

Since, 0.00005 mm is a very small quantity, using screw gauge will help us to measure it precisely.

Some More Questions From Units and Measurement Chapter

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?

Is one unit sufficient to measure a physical quantity?

Can a physical quantity have two or more units? Give example.

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