Electrical Engineering

Please refer to this link it may help you: www.ebmpapst.co.uk/assets/PDF/technical%20library/Synchronous%20Speed.pdf

1000 ohms are in a kilohm.

Think about it as kilo meaning thousand.

It makes sense in the metric system.

One kilogram Sugar equals 1000 grams of sugar.

Same with Ohm. One kilohm equals 1000 ohm.

The frequency of 50 or 60 Hertz (cycles per second) was selected to reduce inductive power losses caused by long distance power line transmission.

These fairly low frequencies still enable alternating current to be converted to various voltages and currents using moderate sized transformers at the point of power use.

The higher the power frequency the higher the inductive losses over a length of power transmission line.

For this reason frequencies higher than 60 Hertz are avoided.

Where possible electrical power transmission over long distances these days is accomplished with high voltage direct current, which is converted to alternating current near the usage areas.

The difference in frequency would cause the compressor to operate out of its design limits. It would not cool properly and fail prematurely.

Linear mode

Technically sound is classified as a vibration of the air, so if there is a sound traveling through it, it travels at the speed of sound, which is 768 mph. The inner parts of the ear will be slower. The auditory ossicles are mechanical, so they will delay the sound accordingly, a small fraction of a second. Then when the auditory nerve is stimulated to send its message to the temporal lobe of the brain, it follows a myelinated path along the axons and can travel up to 200 mph.

R = 1/[1/2 + 1/4 + 1/6 + 1/10]

Add up the reciprocals of the resistances, and take the reciprocal of the answer.

It's an electrical generator converting mechanical power into electrical power. The electrical power comes out in the form of single-phase alternating current.

The only ones that could affect that decision to put one in is if you're planning on smoking or blowing-up that item in the circuit, or the hassle of changing a 20 cent - 5 dollar item instead of the more expensive item.

You can not convert the transformer without cutting the secondary windings. The secondary winding is a split secondary that is wound that way from the manufacturer. To accomplish what you asked would entail unwinding each side of the 12 volt winding half way. At this point solder a pigtail out to a terminal block. This would be your 6 volt tap. Then the coil would have to be rewound to its original state as before the unwind. This same procedure will then be done to the other side of the secondary. Done as a project, maybe, workable within ones capabilities, no.

Yes.

Fuses and circuit breakers are meant to protect your home's wiring from the heat generated from fault-currents and over-currents. Over-currents happen when you exceed the amperage the fuse or breaker is rated for over a period of time (IE: drawing 20 amps on a 15 amp circuit breaker). When this occurs a fuse or circuit breaker will open the circuit so the wiring in your home will not be damaged. Over-currents happen when electricity finds a path, other than the one intended, to ground. When this happens there is very little resistance to slow the flow of electricity and the amperage through the circuit can exceed the fuse or circuit breakers rated capacity by several hundred times . These type of faults cause the fuse or circuit breaker to open the circuit very quickly.

The Liverpool and Manchester Railway was the first modern railway, in that both the goods and passenger traffic was operated by scheduled or timetabled locomotive hauled trains, about 1830. There were cases where horses drew the cars.

read the name plate on the motor

380V

An AC motor is an electric motor that runs on alternating current, like household electricity, as opposed to a DC motor that runs on direct current from a battery.

Most AC motors work from the mains supply, which has a frequency of 50Hz in the UK and 60Hz in the USA.

Other types are available that work like stepper motors and need a specialist supply to run them.

It is very beneficial to have a parallel circuit...

for example:

1. If one light in a parallel circuit goes out, the other light bulbs will remain lit

Whereas if a light in a series circuit goes out, all bulbs will go out

2. If not all light bulbs are needed on, you can turn them off with the remaining light bulbs staying on

In simple terms yes. The circuit is made through the elements of each lamp. So if one blows then it will take the lot out. Just like Christmas tree lights. Now because of this, most xmas tree lighs are wired in parallel. This means that the voltage is constant throughout the circuit unlike a series circuit where the current is constant.

It is possible however unlikely for a lamp to blow but for the element to remain "connected" so a circuit still exists. In the case the other lamp will remain on, though this means that whatever the suppy voltage, will be distributed across this one lamp now instead of the two so it may be too much for it.

Hope this helps

CBurton

England

Watts or kilowatts are units for measuring power. Specialy by alternating electric curent Watt is only for the resistive component.

No power loss occurs in a ideal inductor or capacitor.

The curent for an given power is minimal when V an I are in fase, when fi is 0, and the powerfactor cos fi is 1.

The generator power is P (VA) = V*I

The active power is Pa (W) = V*I*cos fi

The reactive component Pr (VA) = V*I*sin fi

(see related question)

Damage from short circuits can be reduced or prevented by employing fuses, circuit breakers, or other overload protection, which disconnect the power in reaction to excessive current

No. circuit breakers are in series with whatever lines they are protecting. They are never put in parallel with the protected loads (this would defeat the purpose).

Circuit breakers open resulting in an open circuit / no power to outlets when they trip.

Because the capacitor only needs to "excite" one of the two phases of the 230 volt supply in order to start the motor.