Electrical Engineering

Is equal to or less than 1

This motor will consume about 11 Kw of power when it is running. However, motors draw a very large current on startup, so an 11 Kw UPS will not be sufficient. You will most likely need a 20 Kw or larger UPS. Check with the UPS manufacturer, not all UPS's are rated for motor starting. In addition, how long do you want to sustain operation in the event of power loss? If it is more than 15 minutes or so, your batteries will become so large as to be impractical, unless your application is a critical industrial process and you have the funds to burn. Consider a UPS with batteries sized for just a few minutes coupled with a 20-25 Kw autostart generator to feed the UPS if your backup time is more than an hour or so.

Nothing happens. The stereo has a transformer that converts the power to DC, and 50 or 60 Hz input makes no difference.

no you should know it you fat person your lazy and old

The power to propel a ship is dependent on a number of things besides resistance. You must consider the size of the ship, its weight, and its passenger's weight before you can determine the power required to move it.

The objective of any resume is to get a job. The initial goal is to interest a prospective employer enough that they give you a job interview.

P = iv

15 to 40 ohms.

No, your universal alternating current direct current adapter will not mess up your electronic product. The rating that you find on the adapter is the maximum amount that you can draw from the device without damaging it. It is not like there is a surplus of current waiting to be used. The amount of current draw that it can produce is governed by the load demand. What you don't want to do is connect a device to the adapter that has a load higher that the rating of the adapter. Usually you can find the rating on the adapter rated in milli amps (ma) along with the output voltage. Also the load device will have what the amp draw is, also in milli amps.

the magnetizing curve is the relation b/w air gap flux and the field winding current armature EMF. the resulting curve is called magnetizing characteristics or open circuit characteristics. at any speed by recognizing that the induced emf is directly proportional to the speed

There are many electronic ways to brake AC and DC motors the construction of the motors also influence the braking alternatives that can be chosen.
most AC motors can by braked very effectively with a short burst of DC, this locks up the motor very rapidly but may take its toll on the DC supply components , rectifiers contractor's etc. Obviously as its stalling the motor it may also have physical consequences on the mechanical parts involved as well.
An AC car wheel balancer as seen in tyre fitting shops often use DC to slow the motor then also use DC to hold the motor while the operator adds weights.
DC motors can generally be braked by using them as generators, a good example is the regenerative braking systems being designed into modern hybrid vehicles, In a sense they are being used as generators to recharge the battery system.
Until the batteries are fully charged this can be arranged so it is almost as effective as shorting out the motor to magnetically lock it up, there has to be a bit of dynamic impedance matching so that the motor sees a very low impedance,
Some motors such as stepper motors have some inherent braking, if you take a small stepper motor from an old printer you will feel as it rotates it steps to the next position, this can be easily exaggerated by twisting the drive wires together to short out the stepper,
The permanent magnet within the stepper tries to become a generator into the shorted coils and will often lock the motor solid.

Batteries in parallel is not recommended. Not unless they are equalized. the appliances can be one guess since the battery only see a load

100 is to 800 as 75 is to X. Cross multiply, 100 x X and 800 x 75, 100X = 60000. To get rid of the 100 divide it into both sides of the equation. X = 600.

If the copper loss is linear, at 75 percent the copper loss will be 600 watts.

I believe India runs on 50Hz power, so 100 times.

A choke coil, also known as a ballast, limits the current to a fluorescent tube by providing a high impedance to the flow of current. This high impedance restricts the current flowing through the tube, allowing it to operate within its required current range. The choke coil also helps regulate the starting voltage and stabilize the operation of the tube.

power factor 0.8 drops to .05 when two alternator running in parallel

To use an adapter of this sort, its rated voltage must match the rated voltage of the appliance, and its rated current must exceed that of the appliance. So, in your example, the rated voltage is too high to be used with your appliance.

120

The number of Joules (energy) is the same as dc provided the RMS values of the ac quantities are used.

Let's first talk about 2 winding transformer

Say side a a' and b b'

So dot polarity tells us that when a is at higher potential then a' at that instant which among b and b' is at higher potential

So if in a fig dot is over a on a a' side and over b' on b b' side then at the instant when a is at higher potential then a' at that time b' will be at higher potential than b

Imagine we connect three such single phase two winding transformers having dot polarity marked, in delta(or star)

Now we have a three phase transformer with dot polarity.

1. USE GROUNDING TRANSFORMER OR ZIGZAG TRANSFORMER 2. USE SOIL CONDITIONING AGENTS - MARCONITE CONDUCTIVE AGGREGATE AND BENTONITE MOISTURE RETAINING CLAY ON EARTH ELECTRODE BACKFILL.

infinity

no. it doesnt...

you need the current of motor or the KW/HP rating

I use a champion 7000 , but it's major overkill. If you want quiet , then get a couple of 2000 hondas, a cable and you can run tv, a/ c and your lights. Make sure you get the model with the 30 amp plug.