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Question

The acceleration of electron in the first orbit of hydrogen atom is

A
4π2mh3
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B
h24π2mr
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C
h24π2m2r3
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D
m2h24π2r2
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Solution

The correct option is B h24π2m2r3
Orbital Angular momentum
mvr=nh2π n=1

mvr=h2π

v=h2πmr

v2=(h2πmr)2

a=V2r=h24π2m2r3

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