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JEE Main 25 July 2021, Shift 2, Chemistry Q53

Question 53 of 90 in this shift, Chemistry question 23 of 30, Section B.

An accelerated electron has a speed of

5 \times 10^{6}

\mathrm{ms^{-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

]

Official answer

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