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MHT CET202015 Oct 2020Morning ShiftPhysicsAtomic PhysicsActual

The electron in hydrogen atom is moving in an orbit of radius 0.53 Å . It takes 1.571 10⁻¹⁶ ~s to complete one revolution. The velocity of electron will be [ =3 142]

Options

  1. A5.3 10⁶ m s
  2. B4 10⁶ m s
  3. C3 10⁸ m s
  4. D2 12 10⁶ m s

Correct answer

D. 2 12 10⁶ m s

Step-by-step solution

r=0.53 Å, t=1.571 10⁻¹⁶ sec v= 2 r t =2 22 7 53 100 10⁻¹⁰ 10¹¹ 1.57 = 2 22 53 700 1.571 10⁶ =2.12 10⁶ ~m / s

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