Experiment 2
... •Part B: Making an Inductor •Part C: Measurement of Inductance •Part D: Making a Transformer ...
... •Part B: Making an Inductor •Part C: Measurement of Inductance •Part D: Making a Transformer ...
Induction
... The flux through the inductor changes rapidly. An emf is created in the coil that opposes the increase in current. The net potential difference across the resistor is the battery emf opposed by the emf of the coil. ...
... The flux through the inductor changes rapidly. An emf is created in the coil that opposes the increase in current. The net potential difference across the resistor is the battery emf opposed by the emf of the coil. ...
The Physics of Implantable Devices
... • In a pacing system, impedance is: – Measured in ohms – Represented by the letter “R” (W for numerical values) – The measurement of the sum of all resistance to the flow of current ...
... • In a pacing system, impedance is: – Measured in ohms – Represented by the letter “R” (W for numerical values) – The measurement of the sum of all resistance to the flow of current ...
AD5700-1BCPZ-RL7 Datasheet
... added to the corresponding VCC and IOVCC demodulator/modulator current specification to obtain the total supply current required in this mode. ...
... added to the corresponding VCC and IOVCC demodulator/modulator current specification to obtain the total supply current required in this mode. ...
Advanced Control Systems (ACS) - Dr. Imtiaz Hussain
... • is the emission coefficient for the diode. It is determined by the way the diode is constructed. It somewhat varies with diode current. For a silicon diode is around 2 for low currents and goes down to about 1 at higher currents ...
... • is the emission coefficient for the diode. It is determined by the way the diode is constructed. It somewhat varies with diode current. For a silicon diode is around 2 for low currents and goes down to about 1 at higher currents ...
Audio System Troubleshooting, Delco/Delphi VN, VHD
... The radio receiver should remember Preset radio stations that have been programmed in by the owner. The Preset radio stations are stored internally and should be recalled even if the Power Source or Battery (B+) and the ground are removed. The only exception to this rule is the Presets that are stor ...
... The radio receiver should remember Preset radio stations that have been programmed in by the owner. The Preset radio stations are stored internally and should be recalled even if the Power Source or Battery (B+) and the ground are removed. The only exception to this rule is the Presets that are stor ...
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.