Electrical Engineering

Power is volts times amperes, so 120 V and 50 A would be 6000 watts.

However, it also depends on phase angle and power factor, something that is related to reactive loads such as motors and power supplies. As a result, the power may actually be less, so it is more correct to say 6000 volt-amps. The case of 6000 watts being the same as 6000 volt-amps is only true for a purely resistive load such as a toaster.

You can say you are organized and analytical and enjoy problem solving. You can also say there is room for growth.

Current overload from whatever circuit draws current from the transformer? Proper fusing of its supply might protect a transformer from this cause. Or it could have developed a shorted turn fault because the insulation on a winding got old and perished? Or maybe the transformer got damaged if the appliance it is mounted in was dropped?

An amplifier generally amplifies an AC waveform (such as sound), and is powered by a DC source. The majority of the power at the output is then coming from a DC source (the power supply in a power amplifier will convert the 50/60Hz AC power in to DC for the amplifier circuitry). So you can make the argument the above (question) is a true statement.

But an amplifier wouldn't be used to convert from DC to AC power (in general).

The resistors should be connected in parallel .

The only type I am familiar with is the Bird 4391M. This a a digital display wattmeter whereas the Bird 43 is an analog (mechanical meter) device. The digital wattmeter has many functions available such as FWD PWR, RFL PWR, MOD, that are selected by front panel push buttons. It is a very versatile unit for measuring RF signal power. The one disadvantage to the digital wattmeter is that it needs to be powered to operate, either on AC line or the rechargeable battery pack. The Bird 43 wattmeter is a very simple unit to operate and requires no external power. You simply plug in the correct element, making sure the arrow on the element points in the same direction as the RF signal flow, apply the RF power and get the meter reading. With both types of wattmeters, the frequency and power range desired to be measured is determined by plug-in elements that go into the front panel of the unit. If using a Bird wattmeter, I would suggest using Bird elements. The ones made by Coaxial Dynamics are good, but the can sometimes cause calibration errors. I have calibrated the Bird wattmeters for many years and they are very durable. You may want to do an internet search on Bird wattmeters for more information on their particular functions. Hope this helps.

The direction of the current flowing through it must be changed after every half rotation. Otherwise, when the north pole of the coil comes near the south pole of the magnet, there will be attraction between them and the coil will stop rotating.

Wheatstone bridge is used to calculate the resistance of unknown resistor in the circuit.

simplified circuit for three phase cycloconveretr?

V = I * R

or

I = ( V / R )

I = current (amps)

V = Voltage

R = Resistance

The current in a circuit depends on the applied voltage and the resistance of the circuit.

Conjugation is a mechanisms used by bacteria to move genes between cells by exchanging a circular extrachromosomal DNA with each other. Transduction is when viruses that infect bacteria accidentally take some bacterial genes with them into a new cell that htey infect (kinda like STDs). Transformation is when a bacteria gets DNA from its environment.

An induction motor cannot run at synchronous speed because it is the "slippage" of the rotor relative to the rotaing magnetic field that generates the current in the windings contained within the rotor. This induced (hence the term induction) current sets up the opposing magnetic fields that cause the rotor to rotate.

VAC means volts AC, and is a measure of the voltage in an AC circuit.

KVA means kilovolt-amperes, and is a measure of the power in a circuit. For a resistive load, KVA is the same as KW, or kilowatts.

The two terms are not related in that you can not compare one to another without also knowing the current flowing in the AC circuit. VAC * IAC = KVA, when all values are in RMS (not peak to neutral or peak to peak quantities).

An ammeter is a low voltage voltmeter in parallel with a small resistance resistor. Current flow through the resistor creates a voltage drop across it which is then measured by the voltmeter.

in ac circuits

power,P=VICOS@

@ is the angle between voltage and current.

in dc

P=VI

V is the voltage

I is the current.

Power (in Watts) is current (A) x voltage (V)

The function of AVR is to automatically regulate the voltage of Generators. As the terminal voltage of a generators drops the AVR boosts the voltage.

at first point you should determine the also the secondary voltage of the transformer, secondly you should explain what is the application of this transformer.

if you want a special transformer, it is you to decide how much power is needed to be transferred via transformer, and designer tells you it is economical or not.

by the way, if i want to refer you to a standard close to your application, following sizes are available for a 20kv/400v transformer:

50kVA,100kVA, 150, 200,315,500,630,800,1200,1600,2000,2500 and 3500kVA

i hope this helps you

Overhead transmission lines are less expensive, in most cases, significantly less expensive, than underground cables. Underground transmission cables require insulation, cooling systems, and -the most expensive feature- excavation!

2 meg ohms, 2,000,000 ohms to ground.

1 meg ohms.

"Practical application" can best be defined by contrasting it to "theoretical application". A practical application is the real or tangible use of a thing or a concept, whereas the outcome of a theoretical application is nontangibe results not subject to objective measurement because the thing or theory has not actually been put to use.

If you don't have insulation on the wire, then the loops in the coil will touch each other and short to each other. Instead of have x number of turns on the coil, you would basically have a solid conductor if the wire was not insulated.

They both have rotor and stator windings. They create a magnetic field and move a coil of wire through it, thus producing electricity.
The AC generator rotates a mageting field inside the stator. As the poles have both a north and south end, the field generated in staor coils is an AC waveform, as the poles reverse the current at each half turn. The power for the rotating coils are supplied with DC current via slip rings and the (excitation) current can be varied to control the output.
A DC generator has the magnetic field supplied by the stator coils. The induced current of the rotor windings is taken from the rotating shaft via a commutator, a brush and secored contact area. The induced current therefore is only produced over a small arc of the rotor and thus has the same polarity, (albeit interrupted) DC.