0
Why does ceiling fan or cordless phone make humming or buzzing noise when is powered by UPS?
Wiki User
∙ 15y ago
A UPS contains a power inverter, which converts the DC current from the battery into an AC current, which is what you get from a wall plug. Most likely the reason for the buzzing is that the energy delivered by the inverter is not /exactly/ the same waveform as a wall socket. It's current, which should be a smooth sine wave, is actually a stepped square wave. The buzzing you would hear is the change in each step. You can find more on UPS's here: http://en.wikipedia.org/wiki/Uninterruptible_power_supply http://computer.howstuffworks.com/question28.htm You can also find more on Inverters, sine and square waves: http://en.wikipedia.org/wiki/Inverter_(electrical) http://en.wikipedia.org/wiki/Square_wave http://en.wikipedia.org/wiki/Sine_wave
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
Are there such things as a car powered by sun and the moon?
There are solar powered cars.
What is the water cycle powered by?
The Water cycle is powered by the sun.
What is a hurricane powered by?
A hurricane is powered by the latent heat stored in war moist air.
Why is a solar powered air compressor a thermodynamic impossibility?
It's not impossible at all. It would be the same as saying an electric powered compressor is impossible. How a compressor is powered is irrelevant.
What is the magnification of a scanner?
The low powered one because it just is :)
Which tools does Makita offer a cordless version of?
Makita offers a variety of cordless tools for a variety of purposes. These include cordless drills, cordless saws and cordless flashlights, all of which are powered by lithium ion batteries.
What kind of energy does a ceiling fan is powered by?
Well the ceiling fan is powered by electricity. To know more about how it works check this video out.
How is a cordless warming tray powered?
The Toastess Steel Cordless Warming Tray (model: TWT40) is perfect for entertaining and everyday use! This cordless warming tray has an 8 minute warm up time.
What are common uses for a cordless string trimmer?
A cordless string trimmer is used to keep the edge of your lawn neat. You can also use a gas powered trimmer..
What did NASA use cordless power tools for?
NASA needed a way to drill under the moon's surface. So they invented a cordless drill, and soon after many other cordless tools, that was lightweight, small, and battery-powered.
what does a cordless phones mean?
A cordless telephone has a handset that is powered by a rechargeable battery and transmits with an antenna rather than a chord. This allows the user to carry the telephone with them to make and receive calls anywhere in their home.
What are the positives of wind?
Wind could be powered by just a ceiling fan or regular electrical fan.
Is a cordless can opener much more convienent than a manual one, or will it be just another useless item in my cupboard?
Cordless can openers are very useful, whether they be electric or manual powered. The biggest factor is convenience, and if your cordless can opener can go with you, and take up less storage space, why not purchase an inexpensive one to try out.
Which power tools can be powered by a Ryobi 18v battery?
Ryobi tools are becoming increasingly popular because of their versatility. The Ryobi 18V battery can be used with their cordless nailer, drill kit, and cordless blower. It can also be used with their dual function inflator, worklight, and the rotary hammer.
Dyson Digital Slim: The Power Of A Cordless Vacuum ?
Using the latest patented technology, the Dyson Digital Slim vacuum offers tremendous versatility for cleaning the hardest to reach areas. Powered by lithium ion batteries, this cordless vacuum can be set to two operating power modes which provide powerful suction capabilities thanks to the brand's Root Cyclone technology. The lightweight aluminum wand can be detached and used to reach any spot, whether it is up high on the ceiling or below furniture. The fine carbon brushes provide a good grip on the floor.
Do ceiling fans work like tornadoes in southern hemsphere?
In the dynamics of how they work, no. Ceiling fans are powered by electric motors. Tornadoes are driven by thermodynamic processes whether they are in the northern or southern hemisphere. In terms of direction, yes. Most ceiling fans spin clockwise as to most tornadoes in the southern hemisphere.
Is a remote fan control available for ceiling fans?
Ceiling fans powered by remote control are widely available. Some manufacturers of these fans and of ceiling fan remote controls include Del Mar, Monte Carlo, Litex and Hunter and a large selection is available at Lowe's, Home Depot and Wayfair.
