Science > Physics > Elasticity > Shear Stress, Shear Strain, and Modulus of Rigidity In this article, we shall study the concept of shear stress, shear strain, and modulus of rigidity. Shear Stress: When the deforming forces are such that there is a change in the shape of the body, then the stress produced is […]
Science > Physics > Elasticity > Behaviour of Ductile Material With Increasing Load In this article, we shall study the construction and use of Searle’s apparatus to find Young’s modulus of wire and behaviour of ductile material of wire under increasing load. Searle’s Experiment: Apparatus : Two identical wires A and B are suspended from […]
Science > Physics > Elasticity > Stresses and Strains in Compound Wires Problem – 1: For two wires of the same material, both the radii and lengths are in the ratio 1:2. What should be the ratio of stretching forces on the wires if equal extensions are to be produced in the two? Given: Ratio of […]
Science > Biology > Digestion and absorption in Human > Buccal cavity – Mouth The digestive system in humans consists of an alimentary canal and associated digestive glands. The human alimentary canal (aliment: nourish) is a continuous muscular digestive tube about 8 to 10 m long that runs through the body. It is open at two ends […]
Science > Physics > Elasticity > Volumetric Stress, Bulk Modulus of Elasticity In this article, we shall study the concept of volumetric stress, volumetric strain, and bulk modulus of elasticity. Volumetric stress: When the deforming forces are such that there is a change in the volume of the body, then the stress produced in the […]
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 […]
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 […]