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JEEMAIN and NEET
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NEET PAST PAPERS
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2003
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Q)
An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The coulomb force
→
F
between the two is - <br> (where
K
=
1
4
π
ε
0
)
( A )
−
K
e
2
r
3
ˆ
r
( B )
K
e
2
r
3
→
r
( C )
−
K
e
2
r
3
→
r
( D )
K
e
2
r
2
ˆ
r
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