The respective number of significant figures for the numbers $$23.023,\,0.0003{\text{ and }}2.1 \times {10^{ - 3}}$$ are-
A.
$$5, \,1, \,2$$
B.
$$5, \,1, \,5$$
C.
$$5, \,5, \,2$$
D.
$$4, \,4, \,2$$
Answer :
$$5, \,1, \,2$$
Solution :
Number of significant figures in 23.023 = 5
Number of significant figures in 0.0003 = 1
Number of significant figures in 2.1 × $${10^{ - 3}}$$ = 2
Releted MCQ Question on Basic Physics >> Unit and Measurement
Releted Question 1
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Pressure depends on distance as, $$P = \frac{\alpha }{\beta }exp\left( { - \frac{{\alpha z}}{{k\theta }}} \right),$$ where $$\alpha ,$$ $$\beta $$ are constants, $$z$$ is distance, $$k$$ is Boltzman’s constant and $$\theta $$ is temperature. The dimension of $$\beta $$ are-