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TEP 4.4.05 -01 Capacitor in the AC circuit LEP 4.4.05
... Set up the circuit as shown in Fig. 3 to display both terminal voltage and total current of the circuit. There are two major ways to measure the frequency-dependent phase shift between total current and terminal voltage. If, by means of the time-base control of the oscilloscope, one half-wave of the ...
... Set up the circuit as shown in Fig. 3 to display both terminal voltage and total current of the circuit. There are two major ways to measure the frequency-dependent phase shift between total current and terminal voltage. If, by means of the time-base control of the oscilloscope, one half-wave of the ...
Tutorial 2 with answers
... power, the reflected power and the power transmitted into the infinite 75Ω line. Show that power conservation is satisfied. ...
... power, the reflected power and the power transmitted into the infinite 75Ω line. Show that power conservation is satisfied. ...
Alternating Current
... (Q.64) An a.c. circuit containing 800 mH and a 60 μF capacitor is in series with 15 ohm resistance.They are connected to 230 volt, 50 hz a.c. supply.Obtain the average power transferred to each element and the total power absorbed. (Q.65) An a.c. circuit having an inductor and a resistor in series d ...
... (Q.64) An a.c. circuit containing 800 mH and a 60 μF capacitor is in series with 15 ohm resistance.They are connected to 230 volt, 50 hz a.c. supply.Obtain the average power transferred to each element and the total power absorbed. (Q.65) An a.c. circuit having an inductor and a resistor in series d ...
Chapter 17
... When there is both resistance and inductance, some of the energy is alternately stored and returned by the inductance and some is dissipated by the resistance. The amount of energy converted to heat is determined by the relative values of the resistance and the inductive reactance. The Power in the ...
... When there is both resistance and inductance, some of the energy is alternately stored and returned by the inductance and some is dissipated by the resistance. The amount of energy converted to heat is determined by the relative values of the resistance and the inductive reactance. The Power in the ...
Frequency Selective Circuits
... produces interesting interactions between voltages and currents in the circuit. Depending upon the “dampening” (the rate of power dissipation through the resistor), energy may flow back and forth between the capacitor and inductor in a way that causes a “ringing” in the circuit. For this experiment, ...
... produces interesting interactions between voltages and currents in the circuit. Depending upon the “dampening” (the rate of power dissipation through the resistor), energy may flow back and forth between the capacitor and inductor in a way that causes a “ringing” in the circuit. For this experiment, ...
4.6 Basic Input Circuits
... In the above two circuits, current measurement has been used as an indicator of the value of the variable resistance of the transducer. Sometimes, it is more convenient to use a Voltage-divider circuit. ...
... In the above two circuits, current measurement has been used as an indicator of the value of the variable resistance of the transducer. Sometimes, it is more convenient to use a Voltage-divider circuit. ...
LRC Circuits
... voltages at the same time; use your digital cursors to make the measurement, as the instructor will demonstrate. NOTE: Always remember to keep your function generator and scope grounds at the same point. Also, with circuits of this kind, it is best to make measurements at frequencies that increase i ...
... voltages at the same time; use your digital cursors to make the measurement, as the instructor will demonstrate. NOTE: Always remember to keep your function generator and scope grounds at the same point. Also, with circuits of this kind, it is best to make measurements at frequencies that increase i ...
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.