Electrical Conducting Materials for Specific Use Electrical conducting materials are the basic requirement for electrical engineering products. 1) Filament of electric bulb: It is made up of tungsten which has high resistivity, high melting point. 2) Element of heating devices (such as heater, geyser or press): It is made up of nichrome which has high Read more about Electrical Conducting Materials for Specific Use[…]
Law of Radioactive Disintegration The spontaneous breaking of a nucleus is known as Radioactive Disintegration. According to Rutherford and Soddy made experimental study of the radioactive decay of various radioactive materials and gave the following the laws: Radioactive decay is a random and spontaneous process. It is not influenced by external conditions such as temperature, Read more about Law of Radioactive Disintegration[…]
Interference of Light When two waves of exactly same frequency travels in a medium, in the same direction simultaneously then due to their superposition, at some points intensity of light is maximum while at some other point’s intensity is minimum. This phenomenon is called Interference of light. It is of following two types (1) Constructive Read more about Interference of Light[…]
Characteristics of Wave Motion Waves can occur whenever a system is disturbed from equilibrium and when the disturbance can travel or propagate from one region of the system to another. Wave can carry energy and momentum. The energy in light waves from the sun warms the surface of our planet; the energy in seismic waves Read more about Characteristics of Wave Motion[…]
Resistivity, Conductivity and Conductance 1) Resistivity: Resistivity is a measure of the resistance of a given size of a specific material to electrical conduction. From, , if , then i.e. resistivity is numerically equal to the resistance of a substance having unit area of cross section and unit length. i) Unit and dimension: Its SI Read more about Resistivity, Conductivity and Conductance[…]
Various Speeds of Gas Molecules The motion of molecules in a gas is characterized by any of the following three speeds. 1) Root mean square speed: It is defined as the square root of mean of squares of the speed of different molecules. i.e. , (i) From the expression of pressure , , Where, , Read more about Various Speeds of Gas Molecules[…]
Motion of Charge Particle in Electric Field When charged particle initially at rest is placed in the uniform field: Suppose a charge particle having charge Q and mass M is initially at rest in an electric field of strength E. The particle will experience an electric force which causes its motion. (i) Force and Acceleration: Read more about Motion of Charge Particle in Electric Field[…]
Stopping of Vehicle by Retarding Force When the body is moving with a certain velocity and suddenly brakes are applied, then the body stops completely after covering a certain distance, this is called as Stopping Distance. It is the distance travelled between the time when the body decides to stop a moving vehicle and the Read more about Stopping of Vehicle by Retarding Force[…]
Characteristic Curves of a Diode A graph represents the variation of with at a given filament current is known as characteristic curve. The curve is not linear hence diode valve is a non – ohmic device. 1) Space charge limited region (SCLR): In this region current is space charge limited current. Also, ; where is Read more about Characteristic Curves of a Diode[…]
Types of Nuclei The entire positive charge and nearly the entire mass of atom are concentrated in a very small space called the nucleus of an atom. The nucleus consists of protons and neutrons. They are called nucleon. The nuclei have been classified on the basis of the number of proton or the total number Read more about Types of Nuclei[…]