Science > Physics > Photoelectric Effect >Numerical Problems on Einstein’s Photoelectric Equation In this article. we are going to study to calculate the stopping potential and maximum kinetic energy of the photoelectron using Einstein’s photoelectric equation. Example 01: A metal whose work function is 4.2 eV is irradiated by radiation whose wavelength is 2000 A. […]
Science > Physics > Photoelectric Effect >Einstein’s Photoelectric Equation In this article, we shall, derive Einstein’s photoelectric equation and study its use to verify the characteristics of the photoelectric effect of light. Wave Nature of Light: Christian Huygen’s proposed that the light is propagated in the form of a wave. But this theory has a […]
Science > Physics > Photoelectric Effect > Numerical Problems on Photoelectric Effect In this article, we shall study to calculate, Energy of incident photon, threshold wavelength and threshold frequency of metal. Example – 01: The energy of a photon is 2.59 eV. Find its frequency and wavelength. Given: Energy of photon = E = 2.59 […]
Science > Physics > Photoelectric Effect > Photoelectric Effect It is found that when the light of very short wavelength (or high frequency) is incident on a certain metallic surface of photosensitive material, electrons are emitted by the surface. Most of the metals emit electrons when ultra-violet light is incident on them. However, alkali metals […]
Science > Physics > Photoelectric Effect > Problems on Specific Charge In this article, we shall see problems based on Thomson’s experiment to calculate the specific charge (e/m). Example – 01: In Thomson’s experiment, a beam of electrons travelling at 6.8 x 107 m/s is bent into a circular path of radius 4 cm in […]
Science > Physics > Photoelectric Effect > Thomson’s Experiment In this article, we shall study Thomson’s experiment to find the velocity of the electron in cathode rays and the specific charge ratio of an electron. Concept of Work Function: When an electron tries to come out of a metal surface (atom) the remaining part of […]
Science > Physics > Elasticity > Numerical Problems on Poisson’s Ratio In this article, we shall study the concept of poisson’s ratio and numerical problems on it. The concept of this constant (Poisson,s ratio) was introduced by physicist Simeon Poisson. When a rod or wire is subjected to tensile stress, its length increases in the […]
Science > Physics > Elasticity > Numerical Problems on Stress, Strain, and Young’s Modulus In this article, we shall study concept application and numerical problems on longitudinal stress, longitudinal strain, Young’s modulus of elasticity. Conversion Factors: From To Factor mm m x 10-3 cm m x 10-2 m mm x 103 m cm x 102 […]
Science > Physics > Magnetism > Torque Acting on Bar Magnet in Uniform Magnetic Field In this article, we shall study the force acting on poles and torque action on bar magnet suspended in a uniform magnetic field. Force Between Two Magnetic Poles (Inverse Square law): If two poles of strengths m1 and m2 separated […]
Science > Physics > Magnetism > Magnetic Dipole Moment of a Magnet In this article, we shall study the terminology of a bar magnet and the concept of the magnetic dipole moment of a magnet. Bar Magnet: A bar magnet is a rectangular parallelepiped body which exhibits magnetic properties. When a bar magnet is suspended […]