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What percentage of an electric motor is copper?
80
What is the Working principle of mercury vapour lamp?
The mercury in the tube is a liquid at normal temperatures. It needs to be vaporized and ionized before the tube will conduct electricity and the arc can start. So, like fluorescent tubes, mercury vapor lamps require a starter, which is usually contained within the mercury vapor lamp itself. A third electrodeis mounted near one of the main electrodes and connected through a resistor to the other main electrode. In addition to the mercury, the tube is filled with argon gas at low pressure. When power is applied, there is sufficient voltage to ionize the argon and strike a small arc between the starting electrode and the adjacent main electrode. This starting arc discharge heats the mercury and eventually provides enough ionized mercury to strike an arc between the main electrodes. This process takes from 4 to 7 minutes, so mercury lamps are slow starting. Some bulbs include a thermal switch which shorts the starting electrode to the adjacent main electrode, extinguishing the starting arc once the main arc strikes.The mercury vapor lamp is a negative resistance device. This means its resistance decreases as the current through the tube increases. So if the lamp is connected directly to a constant-voltage source like the power lines, the current through it will increase until it destroys itself. Therefore it requires a ballast to limit the current through it. Mercury vapor lamp ballasts are similar to the ballasts used with fluorescent lamps. In fact, the first British fluorescent lamps were designed to operate from 80-watt mercury vapor ballasts.Variation: Metal halideA very closely related lamp design called the metal halide lamp uses various compounds in an amalgam with the mercury. Sodium iodide and scandium iodide are commonly in use. These lamps can produce much better quality light without resorting to phosphors. If they use a starting electrode, there is always a thermal shorting switch to eliminate any electrical potential between the main electrode and the starting electrode once the lamp is lit. (This electrical potential in the presence of the halides can cause the failure of the glass/metal seal). More modern metal halide systems do not use a separate starting electrode; instead, the lamp is started using high voltage pulses as with high-pressure sodium vapor lamps. "MetalArc" is Osram Sylvania's trademark for their metal halide lamps; "Arcstream" and "MultiVapor" are General Electric's trademark. Besides their use in traditional outdoor lighting, these lamps now appear in most computer and video projectors. However, Philips' UHP lamp, introduced in 1995, contains only mercury. As an example of application and efficiency of mercury lamps, the 61" Samsung DLP rear projection TV (HL-S6187W) uses a 150-watt Osram P-VIP lamp. Self-ballasted (SB) lampsThere are mercury vapor lamps with a filament inside connected in series with the arc tube that functions as an electrical ballast. This is the only kind of mercury vapor lamp that should be connected directly to the mains without an external ballast. These lamps have only the same or slightly higher efficiency than incandescent lamps of similar size, but have a longer life. They give light immediately on startup, but usually needs a few minutes to restrike if power has been interrupted. Because of the light emitted by the filament, they have slightly better color rendering properties than mercury vapor lamps. The color temperature is higher than incandescent lamps.
What does it represent that 80 in 8085 microprocessor?
80bit adderss register
Calculate the voltage of a battery if the resistance is 80 ohms and the current is 0.5 amp?
Ohm's law: Voltage is resistance times current. 80 ohms time 0.5 amperes = 40 volts.
What measured load can you put on an electrical panel?
If you have a measured continuous load of say 80 Amps, you would want to have a panel rated at 100 A. For continuous load you want to be at 80% of rated capacity.
What is the 8018 welding electrode meaning?
The correct name of the electrode is E8018. E stands for electrode, the 80 stands for 80000 psi minimum as welded tensile strength, the 1 stands for all position, and the 8 is the number associated with the ingredients of the flux, which in this case is low hydrogen and increased amounts of iron powder.
What are the 5 different types of welding?
There are far more than 5 types or processes of welding. Currently the American Welding Society (AWS) states that there are more than 80 different welding and joining processes. However, some of the common welding processes include shielded metal arc welding (SMAW), gas metal arc welding (GMAW), gas tungsten arc welding (GTAW), flux cored arc welding (FCAW), and oxyfuel gas welding (OFW).
What is the manufacture date of sw n8 80560?
80-83
What is the manufacture date of smith and Wesson number abe6342?
Early 80's
How do you put a scope on a pt-80?
You can't. It's not scopeable, per the manufacture.
What is manufacture date of colt officers series 80 45 auto?
They were manufactured in the 80's that's why it's called a series 80. They were manufactured in the 80's that's why it's called a series 80.
What is a typical open circuit voltage for an arc welding machine?
I read that it can go up to 80 Volts, any more and it becomes a shock hazard to the operator.
What is Manufacture date of Colt Mark VI series 80 serial?
September 18, 1871
What Year did smith and Wesson manufacture the 27-2 serial number N675578?
1979-80
What is the manufacture date of a Smith and Wesson 357 handgun serial AAS8706?
Early 80's.
What does it cost to manufacture one ounce of perfume?
the price can from 2$ to a high of 80$ depending on the ingredients and such
Date of manufacture Glock 19 serial number bfcxxxus?
Mid 80's or so.
