Question

The magnitude of any physical quantity can be expressed as $A\times {10}^n$ where n is a number called order of magnitude and A is :

• A. $0.1\le A<1$
• B. $0.5\le A<5$
• C. $5\le A<9$
• D. $1\le A>9$

Answer 1

The correct option is B $0.5\le A<5$

The magnitude of given quantity is expressed as $A\times {10}^n$
where $A$ must follow the condition $0.5\le A<5$ so that $n$ can be termed as order of magnitude.