Exams › NEET › Physics

If m is mass of electron, v its velocity, r the radius of stationary circular orbit around a nucleus with charge Ze , then from Bohr's first postulate, the kinetic energy 2 2 1 mv K  of the electron in C.G.S. system is equal to

1. r Ze 2 2 1
2. 2 2 2 1 r Ze
3. r Ze 2
4. 2 r Ze

Correct answer: r Ze 2 2 1

Related NEET Physics questions

• The cathode rays have particle nature because of the fact that
• When electron beam passes through an electric field, they gain kinetic energy. If the same beam passes through magnetic field, then
• The ratio of longest wavelength and the shortest wavelength observed in the five spectral series of emission spectrum of hydrogen is
• There are 1 n photons of frequency 1  in a beam of light. In an equally energetic beam, there are 2 n photons of frequency 2  . Then the correct relation is
• According to Bohr's theory the moment of momentum of an electron revolving in second orbit of hydrogen atom will be
• Einstein's photoelectric equation states that     h E k . In this equation k E refers to

⚔️ Practice NEET Physics free + battle 1v1 →