Chapter 11 – Photoelectric Effect

A monochromatic light of wavelength lambda is incident on an isolated metallic sphere of radius a. The threshold wavelength is lambda_(0) which is larger then lambda. A monochromatic light of wavelength lambda is incident on an isolated metallic sphere of radius a. The threshold wavelength is lambda_(0) which is larger then lambda. September 4, 2021 [...]

A beam of white light is incident normally on a plane surface absorbing 70% of the light and reflecting the rest. If the incident beam carries 20 W of power, find the force exerted by it on the surface. A beam of white light is incident normally on a plane surface absorbing 70% of the [...]

Ionization energy of a hydrogen-like ion A is greater than that of another hydrogen-like ion B. Let, r, u, E and L represent the radius of the orbit, speed of the electron, energy of the atom and orbital angular momentum of the electron respectively. In ground state E and L represent the radius of the [...]

If an electron and a photon propagate in the form of waves having the same wavelength , it implies that they have the same If an electron and a photon propagate in the form of waves having the same wavelength it implies that they have the same June 17, 2021 Category: Cengage NEET by C.P [...]

When the momentum of a proton is changed by an amount p0, the corresponding change in the de-Broglie wavelength is found to be 0.25%. Then, the original momentum of the proton was the corresponding change in the de-Broglie wavelength is found to be 0.25%. Then the original momentum of the proton was When the momentum [...]

λe, λp and λα are the de-Broglie wavelength of electron, proton and α particle. If all the accelerated by same potential, then proton and α particle. If all the accelerated by same potential then λe λp and λα are the de-Broglie wavelength of electron June 17, 2021 Category: Cengage NEET by C.P Singh , Chapter [...]

The de – Broglie wavelength of a neutron at 27∘C is λ. What will be its wavelength at 927∘C? The de - Broglie wavelength of a neutron at 27∘C is λ. What will be its wavelength at 927∘C? June 17, 2021 Category: Cengage NEET by C.P Singh , Chapter 11 - Photoelectric Effect , Part [...]

If the kinetic energy of the particle is increased to 16 times , the percentage change in the de – Broglie wavelength of the particle is If the kinetic energy of the particle is increased to 16 times the percentage change in the de-Broglie wavelength of the particle is June 17, 2021 Category: Cengage NEET [...]

In which of the following situations, the heavier of the two particles has smaller de Broglie wavelength ? The two particle In which of the following situations the heavier of the two particles has smaller de Broglie wavelength ? The two particle June 17, 2021 Category: Cengage NEET by C.P Singh , Chapter 11 - [...]

A photon of energy E ejects a photoelectron from a metal surface whose work function is ϕ0. If this electron enters into a uniform magnetic field of induction B in a direction perpendicular to the field and describes a circular path of radius r, then the radius r, is given by, (in the usual notation) [...]