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Question

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005 %. Certainity with which the position of the electron can be located is

(h = 6.6 × 1034 kg m2 s1,mass of electron, em = 9.1 × 1031 kg)


A

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B

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C

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D

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Solution

The correct option is B


According to Heisenberg uncertainty principle.

Δx.mΔv = h4π,Δx = h4πmΔv

Here Δv = 600 × 0.005100 = 0.03

So, Δx = 6.6 × 10344 × 3.14 × 9.1 × 1031 × 0.03

= 1.92 × 103 meter


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