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1.Units, Dimensions and Measurement
normal
$23.023, 0.0003$ અને $ 2.1 × 10^{-3}$ ના અનુક્રમે સાર્થક આંક ........ છે.
A
$4, 4, 2$
B
$5, 1, 2$
C
$5, 1, 5$
D
$5, 5, 2$
Solution
Zeroes before a digit is not counted as a significant figure. In first number all digits are significant. In number second only $3$ is significant all other zeroes are before digit therefore, not counted as a significant figure and numbers in powers are also not counted as a significant number, hence there are only $2$ significant digits in the last number.
Standard 11
Physics
