What is the energy of He⁺ electron in first orbit?
What is the energy of He⁺ electron in first orbit? Options (a) (40.8 eV) (b) (-52.2 eV) (c) (-54.4 eV)…
8 years ago
Questions
If h is Planck’s constant, the momentum of a photon of wavelength 0.01 Å is
If h is Planck's constant, the momentum of a photon of wavelength 0.01 Å is Options (a) 10⁻² h (b)…
8 years ago
If the velocity of an electron increases, then its de Broglie wavelength will
If the velocity of an electron increases, then its de Broglie wavelength will Options (a) Increase (b) Decrease (c) Remain…
8 years ago
If the radioactive dacay constant of radium is 1.07 x 10⁻⁴ year⁻¹, then its half-life
If the radioactive dacay constant of radium is 1.07 x 10⁻⁴ year⁻¹, then its half-life is approximately Options (a) 8900…
8 years ago
The electromagnetic theory of light failed to explain
The electromagnetic theory of light failed to explain Options (a) Photoelectric effect (b) polarisation (c) diffraction interference (d) Correct Answer:…
8 years ago
The Priniple of LASER action involves
The Priniple of LASER action involves Options (a) Amplification of particular frequency emitted by the system (b) Population inversion (c)…
8 years ago
The time by a photoelectron to come out after the photon strikes is approximately
The time by a photoelectron to come out after the photon strikes is approximately Options (a) 10⁻¹ s (b) 10⁻⁴…
8 years ago
The momentum of a photon of energy 1 MeV in kg m/s will be
The momentum of a photon of energy 1 MeV in kg m/s will be Options (a) 5 x 10⁻²² (b)…
8 years ago
In a discharge tube ionization of enclosed gas is produced due to collisions between
In a discharge tube ionization of enclosed gas is produced due to collisions between Options (a) Netural gas atoms/molecules (b)…
8 years ago
We get Balmer series when electron comes from
We get Balmer series when electron comes from Options (a) Higher to 2nd orbit (b) 2nd to higher orbit (c)…
8 years ago