JEE PHYSICS MCQ: UNITS & MEASUREMENTS

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Understanding +4 | -1

In an expression

\mathrm{a} \times 10^{\mathrm{b}}

View answer and explanation

Correct option: B

\mathrm{b}

is order of magnitude for

\mathrm{a} \leq 5

Option D (b is order of magnitude for

a \geq 5

) is incorrect. Option B (b is order of magnitude for

a \leq 5

) is correct because in scientific notation, if 'a' is less than or equal to 5, then 'b' represents the order of magnitude.

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