![RC Circuits](http://s1.studyres.com/store/data/008441894_1-7c9f3f9b5ec41326297acffecb590de9-300x300.png)
ppt
... A 60 V battery is connected to four loads (3.0 , 5.0 , 12.0 , and 15.0 ) in parallel. a) Find the equivalent resistance of the circuit. ...
... A 60 V battery is connected to four loads (3.0 , 5.0 , 12.0 , and 15.0 ) in parallel. a) Find the equivalent resistance of the circuit. ...
unit – 2 principles of circuit breakers
... • Break normal and fault currents • Carry fault current without blowing itself open (or up!) i.e. no distortion due to magnetic forces under fault conditions. The important characteristics from a protection point of view are: • The speed with which the main current is opened after a tripping impulse ...
... • Break normal and fault currents • Carry fault current without blowing itself open (or up!) i.e. no distortion due to magnetic forces under fault conditions. The important characteristics from a protection point of view are: • The speed with which the main current is opened after a tripping impulse ...
Wireless (Power Transfer) Transmission of Electrical Energy
... mally begins on the so-called pure inductor, when it is assumed that the solenoid coil is formed of infinitely The usage of the resonant circuit in the receiver and thin wire without gaps between conductors (turns of transmitter allows transmitting of the highest trans- wire are electrically isolate ...
... mally begins on the so-called pure inductor, when it is assumed that the solenoid coil is formed of infinitely The usage of the resonant circuit in the receiver and thin wire without gaps between conductors (turns of transmitter allows transmitting of the highest trans- wire are electrically isolate ...
Amateur Radio Technician Class License Study Guide
... communications with any country whose administration has notified the ITU that it objects to such communications. [97.111(a)(1)] During an Armed Forces Day Communications Test an FCC-licensed amateur station may exchange messages with a U.S. military station. [97.111(a)(5)] The transmission of codes ...
... communications with any country whose administration has notified the ITU that it objects to such communications. [97.111(a)(1)] During an Armed Forces Day Communications Test an FCC-licensed amateur station may exchange messages with a U.S. military station. [97.111(a)(5)] The transmission of codes ...
Construction of capacitor and inductor
... by B nI , where is permeability and I is current. The relative permeability is k 0 where k is relative permeability, 0 is permeability constant equal to 4 107 Hm-1. Finally, the inductance could be expressed as L n 2 lA . ...
... by B nI , where is permeability and I is current. The relative permeability is k 0 where k is relative permeability, 0 is permeability constant equal to 4 107 Hm-1. Finally, the inductance could be expressed as L n 2 lA . ...
Circuits Diagrams
... Wires are always PERPENDICULAR and PARALLEL Loads appear in the same order in the circuit diagram as stated in a question Switches are ON if the current is flowing Mark the positive and negative ends of the ...
... Wires are always PERPENDICULAR and PARALLEL Loads appear in the same order in the circuit diagram as stated in a question Switches are ON if the current is flowing Mark the positive and negative ends of the ...
oscillators
... produces a potential (static voltage) across its plates, while the inductive coil stores its energy in the form of an electromagnetic field. The capacitor is charged up to the DC supply voltage, V by putting the switch in position A. When the capacitor is fully charged the switch changes to position ...
... produces a potential (static voltage) across its plates, while the inductive coil stores its energy in the form of an electromagnetic field. The capacitor is charged up to the DC supply voltage, V by putting the switch in position A. When the capacitor is fully charged the switch changes to position ...
Conventional Detector Bases
... The NS6 and NS4 Series is designed specifically for use with HOCHIKI Conventional Models SIJ-24 Ionization Smoke Detector, SLR-24V Photoelectric Smoke Detector, SLV-24, SLV-24N, SLV-24V Photoelectric Smoke Detectors, SLR-24H Photoelectric with Heat Smoke Detector, SLR-835 Photoelectric Smoke Detecto ...
... The NS6 and NS4 Series is designed specifically for use with HOCHIKI Conventional Models SIJ-24 Ionization Smoke Detector, SLR-24V Photoelectric Smoke Detector, SLV-24, SLV-24N, SLV-24V Photoelectric Smoke Detectors, SLR-24H Photoelectric with Heat Smoke Detector, SLR-835 Photoelectric Smoke Detecto ...
Crystal radio
A crystal radio receiver, also called a crystal set or cat's whisker receiver, is a very simple radio receiver, popular in the early days of radio. It needs no other power source but that received solely from the power of radio waves received by a wire antenna. It gets its name from its most important component, known as a crystal detector, originally made from a piece of crystalline mineral such as galena. This component is now called a diode.Crystal radios are the simplest type of radio receiver and can be made with a few inexpensive parts, such as a wire for an antenna, a coil of copper wire for adjustment, a capacitor, a crystal detector, and earphones. They are distinct from ordinary radios as they are passive receivers, while other radios use a separate source of electric power such as a battery or the mains power to amplify the weak radio signal so as to make it louder. Thus, crystal sets produce rather weak sound and must be listened to with sensitive earphones, and can only receive stations within a limited range.The rectifying property of crystals was discovered in 1874 by Karl Ferdinand Braun, and crystal detectors were developed and applied to radio receivers in 1904 by Jagadish Chandra Bose, G. W. Pickard and others.Crystal radios were the first widely used type of radio receiver, and the main type used during the wireless telegraphy era. Sold and homemade by the millions, the inexpensive and reliable crystal radio was a major driving force in the introduction of radio to the public, contributing to the development of radio as an entertainment medium around 1920.After about 1920, crystal sets were superseded by the first amplifying receivers, which used vacuum tubes (Audions), and became obsolete for commercial use. They, however, continued to be built by hobbyists, youth groups, and the Boy Scouts as a way of learning about the technology of radio. Today they are still sold as educational devices, and there are groups of enthusiasts devoted to their construction who hold competitions comparing the performance of their home-built designs.Crystal radios receive amplitude modulated (AM) signals, and can be designed to receive almost any radio frequency band, but most receive the AM broadcast band. A few receive shortwave bands, but strong signals are required. The first crystal sets received wireless telegraphy signals broadcast by spark-gap transmitters at frequencies as low as 20 kHz.