What is Resistor? Resistor is defined as A passive electrical component with two terminals that are used for either limiting or regulating the flow of electric current in electrical circuits. What is the SI Unit of Resistor? The SI unit of resistor is Ohm. Color Color code Black 0 Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Violet 7 Grey 8 White 9
TRIAC In this tutorial, we will learn about some of the basics of TRIAC. In the process, we will understand the structure, symbol, working, characteristics, applications of TRIAC. Introduction As we know that the SCR as a unidirectional device and has a reverse blocking characteristics that prevents the current flow in reverse biased condition. But for many applications, bidirectional control of current is required, particularly in AC circuits. To achieve this with SCRs, two SCRs must be connected in anti-parallel to control over both positive and negative half cycles of the input. However, this structure can be replaced by special semiconductor device known as a TRIAC to accomplish the bidirectional control. The TRIAC is a bidirectional switching device that can control the AC power efficiently and accurately. These are often used in motor speed controllers, AC circuits, pressure control systems, light dimmers and other AC control equipments. TRIAC Basics The triac is an i...
Scanning scanning is phase of information gathering in which attacker gather more advanced information about the target like open ports and services running , operating system of the target , etc . Generally this phase gives us vulnerable point about the target. Information gathered by scanning is very important in performing actual HACK . It is important phase which help in gaining access into the system. In scanning, ect. will be covered. Attacker → OSI Layer (Layer 3 & 4) ⟶ Target Network Between attacker and target the core OSI module layers, layer 3 which is ipv4 , ipv6 and icmp and layer 4 which is TCP and UPD is present. Transmission over a network is done through these layers. It is compulsory to understand the working of layer 3 and layer 4 of OSI module if attacker wish to penetrate over network layer.
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