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Physics

Applications of Photovoltaic Cell

Photoelectric Cell

Science > Physics > Photoelectric Effect >Applications of Photovoltaic Cell Photoelectric cell or photocell or photovoltaic cell is an electronic device which works on the principle of the photoelectric effect and converts light energy into electrical energy. Construction: Photocell consists of an evacuated glass tube containing two electrodes emitter (C) and Collector (A). The emitter […]

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Physics

Numerical Problems on Einstein’s Photoelectric Equation

stopping potential

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. […]

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Physics

Einstein’s Photoelectric Equation

stopping potential

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 […]

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Physics

Numerical Problems on Photoelectric Effect

stopping potential

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 […]

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Physics

Photoelectric Effect

Photoelectric Effect

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 […]

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Physics

Problems on Specific Charge Ratio

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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 […]

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Physics

Specific Charge Ratio of Electron

Specific Charge Ratio

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 […]

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Physics

Numerical Problems on Poisson’s Ratio

Poisson's ratio

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 […]

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Physics

Numerical Problems on Stress, Strain, and Young’s Modulus

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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 […]

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Physics

Torque Acting on Bar Magnet in Uniform Magnetic Field

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 […]