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Question

If an electron is travelling at 200 m/s within 1 m/s uncertainty, what is the theoretical uncertainty in its position in μm(micrometer)?

A
14.5
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B
29
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C
58
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D
114
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Solution

The correct option is C 58
According to the Heisenberg uncertainty principle

x.Ph4z

x.meVh4z

xh4zmcV

=6.626×10394×3.14×9.1×1031×1

=0.058×103m=58 μm

So, the correct option is C

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