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Units And Measurement

Question

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The dimensions of $left parenthesis straight mu subscript straight o straight epsilon subscript straight o right parenthesis to the power of negative 1 divided by 2 end exponent$ are

[L^-1T]

[LT^-]

[L-^1/2 T^1/2]

[L^1/2 T^-1/2]

Solution

B.

[LT^-]

This expression for speed of light and the dimensions of speed of light are [LT^-1].

Some More Questions From Units and Measurement Chapter

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.

What are fundamental quantities?

How many fundamental quantities are there in mechanics?

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