JEE Previous Year Question

An accelerated electron has a speed of $5\times 10^{6}m{s}^{-1}$with an uncertainty of $0.02$. The uncertainty in finding its location while in motion is $x\times 10^{-9}m$. The value of x is (Nearest integer) [Use mass of electron $=9.1\times 10^{-31}kg$,$h=6.63\times 10^{-34}Js,\pi =3.14$]

Topic: JEE PYQ

Answer: 58. Full step-by-step solution below.