Q. Which of the following is the smallest unit
A) $Millimetre$
B) $Angstrom$
C) $Fermi$
D) $Metre$
Explanation
1 fermi $= 10^{- 15}\ metre$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.