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Question

Physics Question on Units and measurement

Which of the following is the smallest unit ?

A

millimetre

B

angstrom

C

fermi

D

metre

Answer

fermi

Explanation

Solution

1 mm=10−3 m1\,mm=10^{-3}\,m; 1 ?=10−10 m1\,?=10^{-10}\,m; 1 fm=10−15 m1\,fm=10^{-15}\,m Among the given units fermi is the smallest unit.