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PhysicsJEE Main 21 Jan 2026, Shift 2·Q16·MCQ·Easy–moderate

Atoms · Bohr model

The energy of an electron in an orbit of the Bohr's atom is 0.04E00.04E_0 where E0E_0 is the ground state energy. If L is the angular momentum of the electron in this orbit and h is the Planck's constant, then 2πLh\dfrac{2\pi L}{h} is :
  1. (1)2
  2. (2)4
  3. (3)5
  4. (4)6
We corrected a printing error in the original paper

Source printed “−0.04E0-0.04E_0 eV” (positive, i.e. unbound, since E0E_0 is negative; and a doubled unit).

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