Definition: Bleeder Resistor is a standard resistor which is connected in parallel with the capacitor of the filter circuit to provide discharging of the capacitor. If the capacitor is not discharged properly, then it may lead to an electric shock to the person operating it. Thus, to ensure the safety of the operators working with it, it is necessary to connect a resistor in parallel with the capacitor. Significance of Bleeder Resistor To understand the significance of bleeder resistor, … [Read more...] about Bleeder Resistor
Secondary Electron Emission
Definition: Secondary Electron Emission is the phenomenon in which the primary electrons strikes the free electrons in the metal and impart their energy to them so that they can leave the metal surface. The electrons emitted by this process are called secondary electrons. And this process is called Secondary emission. Visualization of Secondary electron Emission Consider an electron source and an emitter made of metal is placed inside the evacuated tube filled with inert gases. It needs to be … [Read more...] about Secondary Electron Emission
Thermionic Emission
Definition: Thermionic effect or Thermionic Emission can be defined as the phenomenon in which electrons are emitted from the surface of the metal when heat energy is applied to the metal. The word Thermionic is formed from the words Thermal and ions. Thermal means heat and ions are charged particles. Thermionic emission depends on three factors, temperature of the metal surface, area of the metal surface and last but not the least the work function of the metal. Significance of Thermionic … [Read more...] about Thermionic Emission
Photoelectric Emission
Definition: Photoelectric emission is the phenomenon by which intensity of light is utilized for the removal of the electron from the atom. The word Photoelectric is formed from two words photo which means light (Photons) and electric which is related to electron. Thus, light radiation or photons impart their energy for electron emission. That’s why it is called photoelectric emission. Significance of Photoelectric Emission Photoelectric emission is significant for determining the intensity of … [Read more...] about Photoelectric Emission
Hexadecimal Number System
Hexadecimal Number System forms the backbone of the digital system such as microprocessors, microcontrollers etc. It is a number system which consists of 16 elements, in which 10 numbers from 0 to 9 and 6 alphabets from A to F are used. Any other number can be represented in the hexadecimal number system with the help of the combination of these 16 elements. The word hexadecimal is formed from two words, “HEX” and “DECIMAL”. Hex means 6 and decimal mean 10, the sum of these two is 16 which … [Read more...] about Hexadecimal Number System
Octal Number System
The octal number system is a number system which uses eight digits to express any number. The digits used are 0, 1, 2, 3, 4, 5, 6 & 7. All the other digits can be expressed using these 8 digits. You will never see 8 or 9 in any of the numbers in the octal system. The base of the octal number system or radix is 8. This is because the total number of digits in the number system is 8. The positional value of the digits in the octal system can be written in terms of 8 raises to the power the … [Read more...] about Octal Number System
Capacitor
Definition: Capacitor is an electronic component which stores energy in the form of the electric field. When a voltage of some magnitude is applied across the capacitor, then the electric field is created across the plates of a capacitor. Thus, it stores charge due to the static electric field. This stored charge can be used by discharging of capacitor whenever needed. The capacitance is the property of the capacitor which indicates its ability to store charge. It is measured in farads. … [Read more...] about Capacitor
Inductor
Definition: Inductor is a device which stores energy in the form of magnetic field. When current flows through the inductor, it varies the flux linked with the component. Due to this magnetic field is induced around the inductor and thus the inductor stores energy in the form of magnetic field. In a circuit, inductor opposes the sudden change of current in magnitude and direction. When current changes suddenly in magnitude or direction, then inductor induces a voltage. The inductor possesses … [Read more...] about Inductor
Resistor
Definition: Resistor is an electronic device which is used to provide an obstruction in the path of current. Resistors are used in electronics circuits for various applications. It is used as the load in amplifier circuits. A resistor is used with the capacitor to provide discharge of capacitor when the power supply is removed. It is also used in filter circuit with inductor and capacitor. Characteristics of Resistors The resistor has two characteristics which are resistance and power … [Read more...] about Resistor
Binary Number System
Binary Number System comprises of two digits 0 & 1, thus, the base of the binary number system is 2. Thus, it is called as a base-2 system. It is much easier and simpler than decimal number system because it is comprised of only two digits. In binary number system, any number can be expressed by array of numbers in which each coefficient is calculated by successive power of 2. The representation of decimal numbers is done by expressing the digits of the number in power of 10. Similarly in … [Read more...] about Binary Number System