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If the Plank’s constant would be double the present value, in the Bohr’s model for Hydrogen atom,

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a

The speed of the electron in the ground state would be halved

b

The radius of electronic orbit in the ground state would be four times

c

The energy required to ionize the Hydrogen atom in it’s ground state would be doubled

d

The angular momentum of the electron in the ground state would be doubled

answer is A.

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Detailed Solution

r0∝h2⇒r1r2=h1h22⇒r14r1=h1h22⇒h2=2h1V0∝1h⇒v1v2=h2h1⇒v1v12=h2h1⇒h2=2h1E∝1h2⇒E1E2=h2h12⇒E12E1=h2h12⇒h2=h12L∝h⇒L1L2=h1h2⇒L12L1=h1h2⇒h2=2h1

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