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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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2009
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Q)
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
×
10
−
34
k
g
m
2
s
−
1
, mass of electron,
e
m
=
9.1
×
10
−
31
k
g
)
( A )
1.52
×
10
−
4
m
( B )
1.92
×
10
−
3
m
( C )
3.84
×
10
−
3
m
( D )
5.10
×
10
−
3
m
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