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Q.

The orbital velocity of an electron in the ground state is v. If the electron is excited to energy state -0.54 eV, its orbital velocity will be

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a

v

b

v3

c

v5

d

v7

answer is C.

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Detailed Solution

En=−13.6n2⇒n2=−13.6−0.54  or  n2=25.2 or n=5 (nearly)   As v∝1/n, so vn=v5
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