Electrical Engineering

it clips all the bottom voltage off the sine wave,to get steady dc voltage you will need to clean up the ripple to get good voltage regulation

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A diode does not change AC to DC, but it does allow alternating current to flow in only one direction. A diode (or often 2 or 4 diodes) with a filter can be used to rectify AC into DC.

A transformer works basically by means of an electromagnet whose magnetic fields induce a current in adjacent coils, but of a different voltage. The electromagnet has wires through which a current flows. Since the wire has a resistance greater than zero (it is not a superconductor) there is going to be some waste heat produced as a result. And the more current, the more heat. If a transformer is used for currents beyond those for which it was designed, it will therefore overheat.

An electric doorbell uses electrical current thru a coil to move a metal bar using magnetism and cause it to strike a metal plate making a ring sound

In series, each device creates a voltage drop related to the current and impedence of the device, therefore, the voltage for the devices in the circuit are not the same.

Addition:

Also, in a series circuit, if one device fails, all others in the circuit would also "turn off" - think older strands of Christmas lights.

Lets say for example that all the lights in your house were in a series circuit. When you turned the circuit on, all the lights would come on, but when you turn the switch off, all the lights would also go off (possibly useful when leaving for the day or going to bed). Now, one light bulb blows out...every light in the house would go out, leaving you to try replacing every light in the house until you found the correct one...in the dark.

transducer convert one energy to other energy .now in analog transducer it convert energy use of analog signal and digital it converts use og digital signal

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Only Single phase induction motors need capacitor to star it, because of single phase.

With the help of capacitor in the starting winding circuit it is easy to create rotating magnetic field inside motor which is responsible for running of motor.

A shunt capacitor creates a low resistance path in a circuit so that electricity can pass around to another point. Shunt capacitors create shorts when they receive abnormally high amounts of voltage to correct series circuits.

Full load amps is found on the motor's nameplate, and is unique to that particular brand and model number. A Magnetec 2hp motor will draw different amps than a Baldor 2hp, etc. There are high efficiency motors, and not so high as well. Consult the nameplate. If you want a "rule of thumb" to estimate the RLA (Running Load Amps - this is the term most often found on the nameplate - same as full load amps), then use this: Figure about 1400 watts per horsepower. Divide Watts by volts to get Amps, for example: * 3hp motor, 120V * 3hp X 1400 W = 4200 W * 4200 W / 120 V = 35 A This formula is only for single-phase motors! I looked up a typical 3hp 120 V Baldor motor in the Grainger's catalog, and the RLA for it was 32.0, so this will get you in the ballpark. I have seen 3hp 120 V motors as low as 25 A and as high as 40, so DO NOT use the rule of thumb to size branch circuit conductors or overcurrent protection! For 3-phase motors: Figure about 1100 watts per horsepower (3-phase is a little more efficient). Divide Watts by Volts, then divide the answer by 1.73 to get Amps, for example: * 3hp motor, 208V 3Ph * 3hp X 1100 W = 3300 W * 3300 W / 208 V = 15.86 * 15.86 / 1.73 = 9.16 A This formula is only for 3-phase motors! My Grainger's catalog motor with the same Voltage and HP had a nameplate rating of 8.34 A.

A glass tube, emptied of all gases inside, is partially filled with a noble gas, such as Neon. A very high voltage is applied to two electrodes at both ends of the tube. Low pressure gas breaks down under the influence of te high field, and Neon molecules are accelarated and gain energy. As they travel they lose some of this energy in the form of photons, or light, at a very particular wavelength, characterisitic of the particular gas in the tube. Diferent compositions of gases may emit different colors of light.
i dont no do you?? :P

You would reverse rotation on a 3 phase motor to get it to run backwards. Say I fill up a tank truck from a lake. I turn on my generator. I run the motor in one direction. Then I drive the tank truck and the motor to a different location. Then I turn on my generator. I attach the hose to the motor on tank truck. I throw the switch to make the motor run backwards. I aim the hose at the fire in your house. Aren't you glad that I can make my 3 phase motor run backwards?

The same way as an OHM meter. You are measuring resistance in OHMs. However, this meter measures a higher scale of ohmage. It is used for checking insulation which should always have high ohmage (high resistance). The upper scale of high ohmage is marked on the meter as "infinity" or the Greek sysmbol for it.

It is done through a specific formula that is outlined in the electrical code book. Specifically taking the highest loads at 100% and pro rating other connected loads at less than 100% to determine the connected load of the building.

There are buck-boost transformers available that will do just that. I don't know about the buck-boost transformers, but most residential service is 110/220 single phase. The phase is split at the transformer that feeds the house from the power line. You will often see appliances marked with a voltage of 208/230 or something in that rang. So you should have single phase 110/220 volt already. Hope this helps, waterman@bluemarble.net. You cannot get 208V directly from residential service. 208V is usually found in 3 phase commercial/industrial supply. You can get 240V, as mentioned above, between the two hots of residential service. Check the ratings on your device to see if that will work, keeping in mind the device must be able to handle a minumum of 250VAC for that to work.

Optical-fiber systems have many advantages over metallic-based communication systems. These advantages include interference, attenuation, and bandwidth characteristics. Furthermore, the relatively smaller cross section of fiber-optic cables allows room for substantial growth of the capacity in existing conduits. Fiber-optic characteristics can be classified as linear and nonlinear. Nonlinear characteristics are influenced by parameters, such as bit rates, channel spacing, and power levels.

Excessive sparking at the brushes in a DC motor can be caused by several factors, including improper alignment of the brushes, worn or damaged brushes, and uneven commutator surfaces. Additionally, excessive load on the motor, incorrect brush material, or insufficient brush pressure can also lead to increased sparking. In some cases, electrical issues such as arcing due to high voltage or a short circuit can exacerbate the problem. Addressing these issues typically involves inspecting and maintaining the brushes and commutator.

The formula for amps when kilowatts are stated is; kW x 1000/1.73 x Volts x pf.

10 x 1000/1.73 x 415 x .8 = 10000/574 = 17 amps.

The electrical code states that motor feeders have to be rated at 125% of the motors FLA (full load amps). 17 x 125% = 21 amps.

A #10 copper conductor with an insulation factor of 75 or 90 degrees C are both rated at 30 amps.

The cam shaft opens the valves for the inlet of gas/air into the piston chamber & exhaust of used fuel has a smooth rpm operating range. The proper timing of the motor to run idle is usually 600-800 rpm. While the motor is trying to start and gain rpm, the pressure from the compression of fuel lags on all other piston until the smooth idle operating rpm is reached. Making the motor lag on start up.

I found a web site that explains how to do it:

(1st link)

It seems to make sense, but I have not tried it yet.

That is for single phase induction motor

here is for three phase motor

(2nd link)

I tested both links and it works perfectly.

A transformer use a varying voltage on one coil to impress a voltage on another coil by induction. Transformers cannot pass DC as a direct current does not have a varying voltage level. A power transformer connected to a wall outlet receives 120Volts AC (alternating current) at 60 Hertz (cycles per second) into it's primary coil. If it's a step down transformer with a 10-1 turns ratio a 12 VAC voltage will appear at the terminals of the secondary winding on the transformer. The windings (coils) are wound around an iron core to provide a circuit for the magnetic field and improve transformer efficiency. There are many different types of transformers in use, the type is dictated by the application the transformer is being used in. The theory of operation of Transformer

I think the word you might be looking for is conductivity. Look up the definition and see if this word is what you are looking for.

ENERGY CAN BE GENERATED ONLY AS A ALTERNATIG CURRENT.THERE IS NO WAYS OF GENERATING ENERGY AS A DC DIRECTY.IN CASE OF DC GENERATION ,AC IS GENERATED FIRST AND THEN RECTIFIED INTO DC. TO UNDERSTAND THIS CLEARLY YOU NEED TO KNOW THE WORKING OF GENERATORS. THE REASONS FOR GENERATING ENERGY AS AC IS ENERGY CANNOT BE GENERATED AS DC.