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DC, unless you run an extension cord.
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∙ 12y ago
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How many amps do light bulbs draw?
Depend on watt and voltage use of light bulbs. You can use this ohm's law formular to calculate the current draw on light bulbs. I (current in amp) = P (watt)/ E (voltage) If 25W light bulb use in 115V AC (resident home) then current draw will be: 25/115 = 0.22A or 22 miliamperes. Hope this help.
If AC means alternating current used to light up a bulb and alternating current moves up and down then why does light emitted from that bulb not alter to give us first a low light then a bright light?
Electric light bulbs use electric current to heat a filament to high temperature which produces electromagnetic radiation which appears to us as as "heat" in the invisible part of the frequency spectrum and "light" in the visible part. The alternating current (AC) voltage waveform changes at a frequency of 50 or 60Hz (cycles per second of a sine wave) depending on which country you live in. The filament stays heated from cycle to cycle of the AC voltage waveform - the highs and lows of the AC waveform are so close that the filament does not have time to cool off much. It thus seems to emit light continuously for us and we don't notice any reduction in light. One reason contributing to this is the persistence in vision of the human eye - we see anything happening at frame rate of 20 or more per second as continuous. If it were at a slower frequency of AC we would notice the changes in light intensity which occur at the different levels of voltage in the ac waveform.
Does the light switch use direct current or alternating current?
A direct current flows only in one direction. An alternating current changes its direction of flow in a regular (cyclic) way, all the time and usually several times per second.Other answersAn alternating current (AC) is an electrical current whose magnitude and direction vary cyclically, as opposed to direct current, whose direction remains constant.The usual waveform of an AC power circuit is a sine wave, as this is the way the electricity is generated in the power plants. It also allows us to efficiently transmit the energy by transforming it to a higher voltage.Alternating current is an electrical current whose magnitude and direction vary cyclically. The direction of direct current remains constant. The frequency of the electrical system varies by country. Most electric power is generated at either 50 or 60 Hertz (cycles per second).In electronic equipment, different waveforms are used, such as triangular, sawtooth or square waves, the latter form being the "heart and soul" of digital computers and modern communications.During just one cycle of a single-phase alternating supply, the "live" or "hot" wire of an alternating voltage (or current) supply goes from zero to its positive peak, then back to zero, then continues on to its negative peak and back to zero again.These positive- and negative-going parts of each cycle are always voltages (or currents) relative to the "neutral" wire. A neutral wire is necessary to allow the currents to return to the alternator.In a 60 hertz supply there are 60 such cycles in each and every second. Similarly, there are 50 such cycles in each and every second in a 50 hertz supply.The voltage in the "live" or "hot" wire usually follows a waveform very close to a perfect sine wave.Depending on the voltages and currents required, alternators can be, for example, very large power generating machines installed at power stations or the much smaller type of alternators which are fitted into vehicles.AC, or Alternating Current, does exactly what the name implies. In USA, Canada - and in other countries which use the same service frequency - the direction of the current changes 60 times a second (also called a frequency of 60 Hertz) between the 'Hot' (also known as the 'Live') wire - often colored Black - and the Common (also known as the 'Neutral') wire, which is usually colored White. In Europe and many other areas of the world, the service frequency is 50 times a second (50 Hertz).It is the service frequency which makes the typical "humming" sound you hear from transformers or electric AC motors when they are running.The good link below "AC, DC and Electrical Signals" gives a lot more information about the difference between alternating current and direct current.Direct Current and Alternating Current:The first and simpler type of electricity is called direct current, abbreviated "DC". This is the type of electricity that is produced by batteries, static, and lightning. A voltage is created, and possibly stored, until a circuit is completed. When it is, the current flows directly, in one direction. In the circuit, the current flows at a specific, constant voltage (this is oversimplified somewhat but good enough for our needs.)The other type of electricity is called alternating current, or "AC". This is the electricity that you get from your house's wall and that you use to power most of your electrical appliances. Alternating current is harder to explain than direct current. The electricity is not provided as a single, constant voltage, but rather as a sinusoidal (sine) wave that over time starts at zero, increases to a maximum value, then decreases to a minimum value, and repeats.
Why does the alternator drop down when air is on?
The clutch on the AC compressor is an electromagnet. It draws a fair amount of current plus the blower motor and the cooling fan on the radiator.
Who invented the defibrillator?
Bernard Lown is credited with the development of the external form of the defibrillator, a device to restart the heart muscle through the application of a low voltage shock across the heart, or externally across the chest. Lown developed the device based on US cardiologist Paul Zoll's emergency procedure that used simple AC wall current.Alois A. Langer is credited as co-inventor of the implantable defibrillator. The actual development of the implantable ICD was pioneered at Sinai Hospital in Baltimore by a team including Michel Mirowski, Morton Mower, and William Staewen.Defibrillation was first demonstrated in 1899 by Jean Louis Prevost and Frederic Batelli, two physiologists from University of Geneva, Switzerland. They discovered that small electric shocks could induce ventricular fibrillation in dogs, and that larger charges would reverse the condition.(see related links)
What instruments do AC to dc current use?
I would assume that you mean what devices do you use to convert ac current to dc current?The answer is Diodes.seediode-bridge
Can you use AC in motor?
AC current is used in motors.
Does 110 use direct current?
No. 110 volt is AC current
Why do you still use both ac and DC?
Because some appliances work with ac current and some with dc current.
Why does the national grid use AC current?
transformers
Do strobe lights use ac or dc current to flash?
Strobe lights use ac or alternating current to flash. The frequency of 50 Hz is alternating current's frequency, coming in handy for its flashing.
What is ac welding?
AC welders use electric voltage directly from an alternating current outlet.
Does Europe use AC or DC current for electricity?
Europe mostly uses 220 to 240 volts AC current at 50 Hz.
What is the difference between elecrical and electronics?
in electronics we use DC current but in elctrical equipment we use AC current
Which device you use to convert the direct current into AC?
Invertor
Can you use a fusible link wire with 115V AC current?
no
Who invented. Defibrillator?
Bernard Lown is credited with the development of the external form of the defibrillator, a device to restart the heart muscle through the application of a low voltage shock across the heart, or externally across the chest. Lown developed the device based on US cardiologist Paul Zoll's emergency procedure that used simple AC wall current.Alois A. Langer is credited as co-inventor of the implantable defibrillator. The actual development of the implantable ICD was pioneered at Sinai Hospital in Baltimore by a team including Michel Mirowski, Morton Mower, and William Staewen.Defibrillation was first demonstrated in 1899 by Jean Louis Prevost and Frederic Batelli, two physiologists from University of Geneva, Switzerland. They discovered that small electric shocks could induce ventricular fibrillation in dogs, and that larger charges would reverse the condition.(see related links)
