ECE51602012springfinals
... d) What are the Bergeron diagrams? Draw the Bergeron diagram at the source end and load end for a transmitter with a voltage source 0 to 2.5V and edge rate 100ps and a series resistance 12.5 ohm. The impedance of transmission line is 50 ohms and the transit time is 3 nano seconds. The termination re ...
... d) What are the Bergeron diagrams? Draw the Bergeron diagram at the source end and load end for a transmitter with a voltage source 0 to 2.5V and edge rate 100ps and a series resistance 12.5 ohm. The impedance of transmission line is 50 ohms and the transit time is 3 nano seconds. The termination re ...
95MET-2
... more reasonable basis for comparison than ordinary efficiency. The no-load current of a transformer is 5.0 Amps, power factor 0.25 when supplied at 235 V, 50 Hz. Turns on the primary winding is 200. Calculate (a) the maximum value of flux in the core, (b) the core loss. 10. Each phase of a star-conn ...
... more reasonable basis for comparison than ordinary efficiency. The no-load current of a transformer is 5.0 Amps, power factor 0.25 when supplied at 235 V, 50 Hz. Turns on the primary winding is 200. Calculate (a) the maximum value of flux in the core, (b) the core loss. 10. Each phase of a star-conn ...
This article describes a analog IR sensor which gives output voltage
... This article describes a analog IR sensor which gives output voltage ...
... This article describes a analog IR sensor which gives output voltage ...
Tesla Coil - swissenschaft
... matching is of crucial importance. The Q of the secondary may be several hundred and so the on-resonance primary voltage need only be a few tens of volts to achieve several hundreds of thousands of volts at the top electrode of the Tesla coil secondary. Many hundreds of thousands of volts can be ach ...
... matching is of crucial importance. The Q of the secondary may be several hundred and so the on-resonance primary voltage need only be a few tens of volts to achieve several hundreds of thousands of volts at the top electrode of the Tesla coil secondary. Many hundreds of thousands of volts can be ach ...
Brad`s Lecture on Electricity and Power Supplies
... PARTS OF THE TRANSFORMER CONSIST OF ONLY ONE DEVICE! THE TRANSFORMER ITSELF! IT CONSIST OF 2 COILS WHICH “STEP DOWN” OR REDUCE THE VOLTAGE DOWN TO 5 AND 12 VOLTS ...
... PARTS OF THE TRANSFORMER CONSIST OF ONLY ONE DEVICE! THE TRANSFORMER ITSELF! IT CONSIST OF 2 COILS WHICH “STEP DOWN” OR REDUCE THE VOLTAGE DOWN TO 5 AND 12 VOLTS ...
examination of marine engineer officer
... load current is 3A at 0.2 power factor lag when the secondary current is 280A at a power factor of 0.8 lagging. Assume the voltage drop in the winding to be negligible. Find the current taken by the primary and its power factor. 2. A wooden ring has a mean diameter of 20 cm and a cross-sectional are ...
... load current is 3A at 0.2 power factor lag when the secondary current is 280A at a power factor of 0.8 lagging. Assume the voltage drop in the winding to be negligible. Find the current taken by the primary and its power factor. 2. A wooden ring has a mean diameter of 20 cm and a cross-sectional are ...
ET 12
... current is 280A at a power factor of 0.8 lagging. Assume the voltage drop in the winding to be negligible. Find the current taken by the primary and its power factor. 3. A choking coil having an inductance of 0.25 henry and a resistance of 0.1 ohm is connected in series with a capacitor of 10.13 mic ...
... current is 280A at a power factor of 0.8 lagging. Assume the voltage drop in the winding to be negligible. Find the current taken by the primary and its power factor. 3. A choking coil having an inductance of 0.25 henry and a resistance of 0.1 ohm is connected in series with a capacitor of 10.13 mic ...
COILS
... When the points break the circuit to earth, this stops the 10v flow and the magnetic field collapses. This is instantly converted to the large 20,000v which travels thru heavier wiring via the distributor to the spark plug. With starter-motor engaged, there may only be 7volts available to flow to th ...
... When the points break the circuit to earth, this stops the 10v flow and the magnetic field collapses. This is instantly converted to the large 20,000v which travels thru heavier wiring via the distributor to the spark plug. With starter-motor engaged, there may only be 7volts available to flow to th ...
Swedish train detector system
... open. • In the detector circuit there is an adjustable resistor, and a very big inductor in series with the primary port of the relay. The adjustable resistor is needed for adjusting the switching voltage level. The inductor is needed to protect the relay from fast changes in currents. For safety re ...
... open. • In the detector circuit there is an adjustable resistor, and a very big inductor in series with the primary port of the relay. The adjustable resistor is needed for adjusting the switching voltage level. The inductor is needed to protect the relay from fast changes in currents. For safety re ...
Serious ‘XM (That’s W2XM) presents
... Operation of the game is almost intuitive, and you can make up your own rules. Each numeric point value on either game board is a hyperlink which reveals a question. Advancing the game one slide past the question (by clicking the screen) displays the answer. “Back” on the answer slide returns you t ...
... Operation of the game is almost intuitive, and you can make up your own rules. Each numeric point value on either game board is a hyperlink which reveals a question. Advancing the game one slide past the question (by clicking the screen) displays the answer. “Back” on the answer slide returns you t ...
Serious `XM (That`s W2XM) presents
... Operation of the game is almost intuitive, and you can make up your own rules. Each numeric point value on either game board is a hyperlink which reveals a question. Advancing the game one slide past the question (by clicking the screen) displays the answer. “Back” on the answer slide returns you t ...
... Operation of the game is almost intuitive, and you can make up your own rules. Each numeric point value on either game board is a hyperlink which reveals a question. Advancing the game one slide past the question (by clicking the screen) displays the answer. “Back” on the answer slide returns you t ...
Electric Energy and Current Chapter 17
... potential energy between charges at a distance, or between a charge and an electric field. ...
... potential energy between charges at a distance, or between a charge and an electric field. ...
Relationship Between Composition and Wavelength of LEDs
... gap varies directly with the unit cell constant and since that unit cell constant has reached its minimum value when the ratio of P to As in the LED has reached its maximum, no larger band-gaps can be expected with this particular family of LEDs. Since blue light would require a larger band gap, blu ...
... gap varies directly with the unit cell constant and since that unit cell constant has reached its minimum value when the ratio of P to As in the LED has reached its maximum, no larger band-gaps can be expected with this particular family of LEDs. Since blue light would require a larger band gap, blu ...
Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""