Electrical Engineering

one ton

Diameter of ring=34.1/3.414=9.9cm ( approx 10 cm)

The higher-voltage winding has more turns (therefore its conductor will be longer) than the lower-voltage winding and, because it will carry less current, its conductors will have a lower cross-sectional area. Consequently, the higher-voltage winding will have a higher resistance than the lower-voltage winding.

Deji Plaza Phase 2 is a building found at Nanjing in China.

no

Electricity is nearly always sold in kilowatt-hours (kW h). It is important to note that this is not a measure of kilowatts per hour (kW/h) but the product of kilowatts and hours.

1500 watts is 1.5 kilowatts. Assuming a month containing 31 days, with 24 hours per day the month would contain 744 hours. The heater uses 1.5 kW when operating, so multiplying the two gives the result that your heater is using 1116 kW h per month if it is left running all the time.

Without knowing the price of a kW h in Chigaco I cannot answer further. However in Maine I pay on average about $0.16 per kW h in my market. So for me to run your heater non stop for a month it would cost me $178.56.

To find this result for yourself, determine how much you pay per kW h and multiply that number by 1116 kW h.

when both runs at same speed

bearing faults and circuit connection faults

Ampere; commonly abbreviated to "A," and named after Andre-Marie Ampere (1775-1836), a French mathematician and physicist.

Running current. The locked rotor amps are only seen at initial start up which only lasts a fraction of a second to one or two seconds.

Using a fuse correctly rated for current but "overrated" for voltage does not present a problem. Current ratings are critical safety issues, and fuses should be replaced with those of the same current rating. But using a fuse with an identical current rating but a higher voltage rating is not a problem. The reason for that lies in what the voltage rating of a fuse is.

Fuses are given a voltage rating to state a maximum voltage in a circuit that they are designed to protect. And the voltage rating has nothing to do with the "normal" operation of the fuse. The fuse carries current when it operates normally, but when something happens and excessive current flows, the fusible link heats up and opens. This is where the voltage rating comes into play. It is possible that a fuse can arc through when it fails. It is the voltage rating that stands in the way of this.

As long as the voltage rating of a circuit is not beyond the voltage rating of the fuse, that fuse will fail safely when it fails. It is acceptable to use a fuse of an equal current rating but a higher voltage rating when replacing a fuse that has failed.

instantaneous current

transient current

inrush current

Photoflash

Uses a Xenon tube in parallel with a capacitor

capacitors in the hand held variety of photo flash are charged slowly with some sort of battery and oscillator

when the capacitor is charged to 600V or so it is ready to discharge

there will be an ignition coil to ionize the Xe

when the Xe starts to completely ionize In a 1" long tube its resistance fall from near infinity to 1/2 Ohm

This is about 1200 Amps

those little cameras use #20 wire

the average current is well below 1 amp

to figure the wire size i^2 * R is not so significant

more easily approximated as I^2*t

you figure the amount of power with I^2*r and the amount of time

this times the mass of the wire tells you how long it will take for the wire to melt

witch is how fuses work

photoflash the wire made from Xenon molecular wt 54 takes a while to heat to 9000K or so and to take pictures we like the black body spectrum rather than the bright bands in the uv its very near sunlight

This takes about 1 millisecond

the flash tube for a ruby laser is usually krypton wt 32

this heats much faster the flash lasts for about a 1 Microsecond

this flash runs the ruby up to those higher energy levels then as a few discharge and trigger others

this happens in about 1Nanosecond

A short time

becouse its gay

It's desirable but not essential. For devices such as motors, then the impedance of each phase would normally be identical. But for separate, independent, loads, while it would be ideal, it's rarely the case.

A volt - ampere is the unit for the product of voltage and current. This is power.

Power = voltage x current.

The unit of power is more usually called the watt.

Volts x amps = watts.

A ballast increases the starting voltage in fluorescent and other gas-discharge lamps by providing an initial high voltage surge needed to ionize the gas within the lamp. This initial voltage, often several hundred volts, creates a conductive path for current to flow. Once the gas is ionized and the lamp starts operating, the ballast then regulates the current, preventing excessive current flow and ensuring stable operation.

No diodes do not increase voltage the most common diode can be thought pf as a one way gate that will only allow the flow of electricity in one direction.

these diodes can be used in groups to form a rectifier which converts ac to dc

You are mixing up 'phase angle' with 'angular displacement' (or 'phase displacement'); these are two completely different things. The term you should be using is 'angular displacement', which is the angle by which the secondary line voltages lagthe primary line voltages. The '7' indicates that this is 7 times 30 degrees; or 210 degrees.

i think its use for 3 phase connection.

as far as i know there will not be a short circuit 3 coming out any time soon

2

in this test their is a no load on dc shunt motor so it is an indirect test

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