Question
Physics Question on Units and measurement
In an experiment, the length of an object is measured to be 6.50 cm. This measured value can be written as 0.0650 m.The number of significant figures on 0.0650m is
A
3
B
4
C
2
D
5
Answer
3
Explanation
Solution
The correct answer is option (A): 3
Significant figures are the numbers of digit in which a value in which a value of physical quantity can be expressed properly.
The following rules must be known to find the number of sig. value
(1) All non-zero numbers are significant.
(2) All zeros are significant except if they lie within two sig. numbers or placed at the end.
(3) In exponential notation, the numerical is the number of sig. figures.
So, here the given number is 0.0650 where “0.0” is insignificant and 650 is significant.
Hence, the number of insignificant figures is 3.