Notes with worthy tutorials
Process of Producing Image on the Screen by a Color CRT Monitor: A color CRT monitor has 3 electron guns at its back. These 3 guns fire 3 electron beams at once through a magnetic coil that aims the beams to the screen. The screen is coated with a chemical called phosphors that glow when … Read more
Though it may seem from the names that memory and storage devices are same thing, but actually they are far different. Following are the differences between Memory and Storage Devices. 8 Differences between memory and storage devices: Term Memory Storage Speed Very speedy, that is, it responds very fast Slower than memory devices Cost Very … Read more
Computer Hardware: Computer Hardware is any part of the computer that can be touched. These are primarily electronic devices used to build up the computer. Computer Hardware actually perform the computing operations along with taking input and outputting the computed result or to store that. There are four categories of computer hardware, they are being described below. … Read more
Information Processing Cycle: The task of computer, in low level, is to process given data to produce information. Computer takes data, then processes the data as per being instructed and then can either output the generated information to user or store the information to storage or can do both. The generated information can be treated … Read more
A system, such as: a computer, mobile or device like microwave oven, must need software to function. A software is a set of coded instruction for the system to execute in order to have it’s hardware parts performing actions. However, software is primarily of two types, system software and application software. System Software: Software that … Read more
Measurement of Price Elasticity of Demand: There are 5 different measurements of Price Elasticity of Demand. They are as follows: Perfectly Inelastic Demand (Elasticity = 0) Perfectly Elastic Demand (Elasticity = Infinity) Unit Elasticity of Demand (Elasticity = 1) Relatively Inelastic Demand (Elasticity < 1) Relatively Elastic Demand (Elasticity > 1) These measurements has been … Read more
Value of Half-Life Period From the law of radioactive disintegration, we know, If, be the half life period, then at, ,
The Law of Radioactivity Disintegration: Let, N be the number of atoms present in the radio element at a given instant t. Then the rate of decrease, Here, λ is the disintegration constant. It is defined as the ratio of the amount of the substance which disintegrates in a unit time to the amount of … Read more
General Properties of Nucleus: (i) Nuclear Size: From Rutherford’s work, the mean radius of nucleus is and the radius of the atom is . Thus the radius of the nucleus is 10,000 times smaller than the radius of the atom. The empirical formula for the nuclear radius is, Here, A is the mass number, is a constant. From … Read more
The Required de Broglie Wavelength: A photon of light of frequency has the momentum, But, . Therefore, the momentum of the photon can be expressed in terms of wavelength λ as, The wavelength of a photon is, therefore, specified by its momentum according to the relation, de Broglie suggested that the above equation is applicable for any … Read more