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KCET2012PhysicsAtomic Physics

In hydrogen atom, electron excites from ground state to higher energy state and its orbital velocity is reduced to 1 3 rd of its initial value. The radius of the orbit in the ground state is R . The radius of the orbit in that higher energy state is

Options

  1. A9 R
  2. B2 R
  3. C3 R
  4. D27 R

Correct answer

C. 3 R

Step-by-step solution

According to Bohr's orbit m v r= n h 2 i.e., v 1 r , v ₁ v ₂ = r ₂ r v v / z = r₂ R r₂=3 R

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