Electrical sockets (outlets) in the People's Republic of China usually supply electricity at between 220 and 240 volts AC. But travel plug adapters do not change the voltage, so the electricity coming through the adapter will still be the same 220-240 volts the socket is supplying. But that doesn't mean that your specific appliance isn't already compatible with the higher voltage -- it may very well be.
Short answer: The only way to know is to check, and there's absolutely no getting around that crucial step.
The electrical input specifications will appear on a label on the appliance itself, or on its charger or AC adapter if it uses one, near where the brand name and model number appear. Desktop computer: Usually switchable between 110-120V and 220-240V via a small switch on the back of the computer, near the cooling fan.
Cell phone: Usually comes with a charger that is 100-240V compatible, but that is by no means always the case. If your appliance is already compatible with 220-240 volt electrical input, one or more of the following travel plug adapters (depending on which type of outlet is installed in any given specific building) will allow you to plug in.
If your appliance's plug doesn't match the shape of these sockets, you will need a travel plug adapter in order to plug in. Electrical sockets (outlets) in Hungary usually supply electricity at between 220 and 240 volts AC. But the development of electricity at Niagara Falls was about electricity for industrial power, not light. To justify the huge and extremely costly project of harnessing the natural wonder of Niagara Falls for electricity required, first of all, identifying a market for the vast amount of electrical power that would be produced.
The development of the AC system was the work of the genius Nicola Tesla, working for George Westinghouse, Edison's great rival in the electrical industry. Tesla didn't invent AC electricity or the transformer--the theoretically simple device that could boost the voltage of AC, making it economical for transmission (by Ohm's law, E = IR, according to which raising the voltage, E, reduces, relatively, amperage, I, and resistance, R, which is where losses occur). The final irony was on the order of the "build it and they will come" thesis of the baseball movie. Chemical companies and other industries occupying the lands of the Niagara Falls Power Company.
Hard X-rays can penetrate solid objects, and their largest use is to take images of the inside of objects in diagnostic radiography and crystallography. The roentgen (R) is an obsolete traditional unit of exposure, which represented the amount of radiation required to create one electrostatic unit of charge of each polarity in one cubic centimeter of dry air.
The rad is the (obsolete) corresponding traditional unit, equal to 10 millijoules of energy deposited per kilogram. The sievert (Sv) is the SI unit of equivalent dose, which for X-rays is numerically equal to the gray (Gy). X-rays are generated by an X-ray tube, a vacuum tube that uses a high voltage to accelerate the electrons released by a hot cathode to a high velocity.
In crystallography, a copper target is most common, with cobalt often being used when fluorescence from iron content in the sample might otherwise present a problem. X-ray fluorescence: If the electron has enough energy it can knock an orbital electron out of the inner electron shell of a metal atom, and as a result electrons from higher energy levels then fill up the vacancy and X-ray photons are emitted. So the resulting output of a tube consists of a continuous bremsstrahlung spectrum falling off to zero at the tube voltage, plus several spikes at the characteristic lines. In medical diagnostic applications, the low energy (soft) X-rays are unwanted, since they are totally absorbed by the body, increasing the dose. To generate an image of the cardiovascular system, including the arteries and veins (angiography) an initial image is taken of the anatomical region of interest.
A specialized source of X-rays which is becoming widely used in research is synchrotron radiation, which is generated by particle accelerators. The most commonly known methods are photographic plates, photographic film in cassettes, and rare earth screens.
Before the advent of the digital computer and before invention of digital imaging, photographic plates were used to produce most radiographic images. Since photographic plates are sensitive to X-rays, they provide a means of recording the image, but they also required much X-ray exposure (to the patient), hence intensifying screens were devised. Areas where the X-rays strike darken when developed, causing bones to appear lighter than the surrounding soft tissue.
Contrast compounds containing barium or iodine, which are radiopaque, can be ingested in the gastrointestinal tract (barium) or injected in the artery or veins to highlight these vessels.


An increasingly common method is the use of photostimulated luminescence (PSL), pioneered by Fuji in the 1980s. The PSP plate can be reused, and existing X-ray equipment requires no modification to use them. For many applications, counters are not sealed but are constantly fed with purified gas, thus reducing problems of contamination or gas aging. Some materials such as sodium iodide (NaI) can "convert" an X-ray photon to a visible photon; an electronic detector can be built by adding a photomultiplier. However, since it is alternating current, the current reverses direction many times a second.
This acts as a bottleneck, reducing the amount of power reaching the destination end of the cable. The first is the grounded, three-blade CPCS-CCC which is practically interchangeable with the type of socket found in Australia. If you're plugging in an appliance that was built for 220-240 volt electrical input, or an appliance that is compatible with multiple voltages, then an adapter is all you need. North American sockets supply electricity at between 110 and 120 volts, far lower than in most of the rest of the world. This usually includes things like laptops, PDAs, cell phones, digital cameras, digital camcorders, many portable video game devices, digital music players, etc.
This item can be brought just about anywhere in the world, and any difference in voltage is basically irrelevant.
If the socket is 220-240V, then an adapter by itself isn't enough, because travel plug adapters do not change the voltage supplied by the socket.
The information below is just a general guideline, and it may or may not be correct for your specific brand and model.
A travel plug adapter will work fine as long as the voltage switch is set to the proper position. There are so many different versions, it's impossible to keep up with what kind of charger ships with any particular model.
Travel plug adapters simply change the shape of your appliance's plug to match whatever type of socket you need to plug into. The theme image of the Pan-American Exposition was light--specifically, electrical light--referring to Buffalo's proximity to Niagara Falls, and consequent potential to exploit the almost limitless electrical energy of the Falls.
Tesla's great contribution was the development of the AC motor, completing the loop, making AC electricity a feasible industrial commodity.
They harnessed the falls and immediately major industries--most notably the fledgling Pittsburgh Reduction Company, which later became Aluminum Company of America, then a number of chemical companies--moved to Niagara Falls to buy and use the power. He was formerly a technical writer and editor for several area environmental consultant firms, and a reporter with several newspapers. This process produces an emission spectrum of X-ray frequencies, sometimes referred to as the spectral lines. The intensity of the X-rays increases linearly with decreasing frequency, from zero at the energy of the incident electrons, the voltage on the X-ray tube. A second image is then taken of the same region after iodinated contrast material has been injected into the blood vessels within this area. The contrast compounds have high atomic numbered elements in them that (like bone) essentially block the X-rays and hence the once hollow organ or vessel can be more readily seen. In modern hospitals a photostimulable phosphor plate (PSP plate) is used in place of the photographic plate. More and more personal grooming items like hair dryers curling irons, shavers (especially cordless ones) and such are being built to be compatible with multiple voltages as well, but most of them aren't. You probably have to physically flip a switch somewhere, but as long as that switch is in the proper position and you have the appropriate plug adapter, you're fine.
If it's crucial to be able to plug in no matter what, bring an adapter for all three types. The first-time-ever large-scale development of this new energy type had occurred at the Falls five years prior to the Pan-Am. But then there needed to be a method to transmit the power from the Falls to Buffalo, a distance of 25 miles.
It wasn't for several years, after expansion of the original generating capacity, that they began selling substantial amounts of electricity to the Buffalo market.
The spectral lines generated depend on the target (anode) element used and thus are called characteristic lines.


These two images are then digitally subtracted, leaving an image of only the iodinated contrast outlining the blood vessels. Photographic film largely replaced these plates, and it was used in X-ray laboratories to produce medical images. In the pursuit of a non-toxic contrast material, many types of high atomic number elements were evaluated. After the plate is X-rayed, excited electrons in the phosphor material remain "trapped" in "colour centres" in the crystal lattice until stimulated by a laser beam passed over the plate surface. Electrons accelerate toward the anode, in the process causing further ionization along their trajectory.
To use this appliance safely, the voltage needs to be changed from 220-240 volts to 110-120 volts by way of a voltage converter or transformer. If not, the easiest solution is probably to contact your cell phone provider and buy a new charger which is multi-voltage compatible, and attach the appropriate plug adapter to the multi-voltage charger. Since AC adapters are converting an AC voltage to a smaller DC voltage anyway, the AC input voltage is often irrelevant. These are beyond the scope of our business, and we don't claim to be authorities on those matters.
Edison supplied most of the electrical lighting in use at the time, and held the key patents that applied to electrical lighting production and manufactures. But Edison had no interest in Tesla's life-long real interest--AC--and provided little encouragement or incentive for Tesla to work on this pet project. The radiologist or surgeon then compares the image obtained to normal anatomical images to determine if there is any damage or blockage of the vessel. In more recent years, computerized and digital radiography has been replacing photographic film in medical and dental applications, though film technology remains in widespread use in industrial radiography processes (e.g.
For example, the first time the forefathers used contrast it was chalk, and was used on a cadaver's vessels. This process, known as a Townsend avalanche, is detected as a sudden current, called a "count" or "event". Since hair dryers and other hair care appliances usually don't contain any electronic circuits, a voltage converter is usually more convenient than a step-down transformer.
The Rainbow City: Celebrating Light Color and Architecture at the Pan-American Exposition, Buffalo 1901. It was impossible to transmit direct current (DC), the form of electricity then mostly in use, more than about a mile. When the film is developed, the parts of the image corresponding to higher X-ray exposure are dark, leaving a white shadow of bones on the film. Due to a substantial Hong Kong presence in mainland China, some buildings are wired with British BS-1363 sockets, which is the primary socket type used in Hong Kong. Edison's lighting industry used DC, which was supplied from numerous "central stations," each serving about a one-square mile area. Photographic plates are mostly things of history, and their replacement, the "intensifying screen", is also fading into history.
If your appliance's plug doesn't match the shape of these sockets, you will need one or more travel plug adapters in order to plug in.
The metal silver (formerly necessary to the radiographic & photographic industries) is a non-renewable resource. If that's true of yours, then theoretically a voltage transformer + a plug adapter would at least allow it to power up. Thus it is beneficial that this is now being replaced by digital (DR) and computed (CR) technology.
If it is crucial to be able to plug in no matter what, bring an adapter for all three types.
But in practice, the difference in frequency (Hz) may negatively affect the machine's performance.
Where photographic films required wet processing facilities, these new technologies do not. The better solution may be to just buy a multi-voltage compatible CPAP machine, rather than to depend on a transformer.



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