Get help, support, and tutorials for Windows products—Windows 10, Windows 8.1, Windows 7, and Windows 10 Mobile. Please enable cookies and refresh the page. ![]() Electromagnetic field. An electromagnetic field (also EMF or EM field) is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field. The electromagnetic field extends indefinitely throughout space and describes the electromagnetic interaction. It is one of the four fundamental forces of nature (the others are gravitation, weak interaction and strong interaction). The field can be viewed as the combination of an electric field and a magnetic field. The electric field is produced by stationary charges, and the magnetic field by moving charges (currents); these two are often described as the sources of the field. ![]() The way in which charges and currents interact with the electromagnetic field is described by Maxwell's equations and the Lorentz force law. From a classical perspective in the history of electromagnetism, the electromagnetic field can be regarded as a smooth, continuous field, propagated in a wavelike manner; whereas from the perspective of quantum field theory, the field is seen as quantized, being composed of individual particles. In the past, electrically charged objects were thought to produce two different, unrelated types of field associated with their charge property. An electric field is produced when the charge is stationary with respect to an observer measuring the properties of the charge, and a magnetic field as well as an electric field is produced when the charge moves, creating an electric current with respect to this observer. Over time, it was realized that the electric and magnetic fields are better thought of as two parts of a greater whole — the electromagnetic field. ![]()
Until 1. 82. 0, when the Danish physicist H. C. ? rsted discovered the effect of electricity through a wire on a compass needle, electricity and magnetism had been viewed as unrelated phenomena. There are different mathematical ways of representing the electromagnetic field. The first one views the electric and magnetic fields as three- dimensional vector fields. These vector fields each have a value defined at every point of space and time and are thus often regarded as functions of the space and time coordinates. As such, they are often written as E(x, y, z, t) (electric field) and B(x, y, z, t) (magnetic field). If only the electric field (E) is non- zero, and is constant in time, the field is said to be an electrostatic field. Similarly, if only the magnetic field (B) is non- zero and is constant in time, the field is said to be a magnetostatic field. However, if either the electric or magnetic field has a time- dependence, then both fields must be considered together as a coupled electromagnetic field using Maxwell's equations. When an EM field (see electromagnetic tensor) is not varying in time, it may be seen as a purely electrical field or a purely magnetic field, or a mixture of both. However the general case of a static EM field with both electric and magnetic components present, is the case that appears to most observers. Observers who see only an electric or magnetic field component of a static EM field, have the other (electric or magnetic) component suppressed, due to the special case of the immobile state of the charges that produce the EM field in that case. In such cases the other component becomes manifest in other observer frames. A consequence of this, is that any case that seems to consist of a "pure" static electric or magnetic field, can be converted to an EM field, with both E and M components present, by simply moving the observer into a frame of reference which is moving with regard to the frame in which only the “pure” electric or magnetic field appears. That is, a pure static electric field will show the familiar magnetic field associated with a current, in any frame of reference where the charge moves. Likewise, any new motion of a charge in a region that seemed previously to contain only a magnetic field, will show that the space now contains an electric field as well, which will be found to produces an additional Lorentz force upon the moving charge.
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Kotaku. It’s cake versus ice cream for Splatoon 2's first Splatfest and we’re streaming all the fun live on our Twitch channel. Come and join the mayhem! You can watch a saved recording of the stream below. MS Paint, the first app you used for editing images, will probably be killed off in future updates of Windows 10, replaced by the new app Paint 3D. Microsoft lists.![]() TheINQUIRER publishes daily news, reviews on the latest gadgets and devices, and INQdepth articles for tech buffs and hobbyists. It’s cake versus ice cream for Splatoon 2's first Splatfest and we’re streaming all the fun live on our Twitch channel. Come and join the mayhem! How to tag classical music in iTunes for better use with iPod (Stan Brown). By automatically improving art, Paint 3D hides the process behind the image. Paint’s sloppiness is probably why rage comics got so popular. Looking at a rage comic. ![]() Mariah. Carey > News.
Ulysses isn’t going to be the last app forced to make this decision. As consumers demand more and more from “minor” updates software developers will need to. Google Home owners will probably be talking to their living rooms a lot more thanks to an update that lets the voice assistant make phone calls to the U.S. and Canada. The next time you’re asked to lead a meeting, teach a class, or give a speech, here’s one way to get everyone’s attention: look at individual people instead of. Here’s How to Enable Google Home’s Latest Updates. Google Home owners will probably be talking to their living rooms a lot more thanks to an update that lets the voice assistant make phone calls to the U. S. and Canada. It’s one of many recent updates granting the smart home device more features and compatibility with other services. No more missed important software updates! UpdateStar 11 lets you stay up to date and secure with the software on your computer. ![]() ![]() Phone Calls Without the Phone. The calls are made over Wi- Fi, with numbers pulled either from businesses or your Google Contacts list. Saying the phrase “Hey Google, call Dad” is enough to get your pop pop on the horn (in speakerphone mode, of course). If you share your Google Home with someone else, its voice recognition capabilities will ensure you call the appropriate patriarch. Google may be playing catch up with the Amazon Echo, but Google Home already has a bunch of…Read more There are a few bugs Google needs to iron out to make this a truly seamless calling experience, however. For starters, the Google Home call recipient won’t see your number (unless you have Project Fi—more on that below), though the company says it’ll display the correct number for all users by the end of the year. It also doesn’t have 9. Project Fi Users Get Perks. Google Home owners using Google’s Project Fi wireless phone service or Google Voice are privy to an extra feature or two compared to customers with a different wireless provider. For one, your phone number is displayed on your call recipient’s phone, meaning they’ll actually see who’s calling instead of assuming you’re some sort of robocaller. You can also make calls to “premium rate numbers” and international numbers at their respective rates, a feature unavailable to Google Home owners without the aforementioned accounts. Visit “More Settings” then select “Calls” to activate the feature. Finally, Bluetooth Support. In addition to making phone calls, Google Home’s software update finally adds Bluetooth audio streaming support, a much- requested feature that’s been present in Amazon’s competing Echo voice assistant since its own debut. It also adds free built- in streaming music through Spotify Free and Deezer, a perk previously associated exclusively with premium accounts. Granted, you won’t be able to play songs on- demand with the built- in Spotify Free account, but at least you’ll be able to listen to some ad- supported hits and use Google Assistant to select different playlists. Not a streaming music subscriber? If you don’t use any of Google Home’s supported music streaming services, you can connect your Google Home to your phone via Bluetooth and play tunes through the app of your choice. Open the Google Home app, hit the Devices button in the top right corner, then tap the three dots next to your Google Home. From there you can select Paired Bluetooth Devices and add your own. Google Assistant offers simplified voice commands when paired over Bluetooth, like pausing and volume control, and lets you play tunes from places besides Google Play Music or Spotify (like Apple Music or Overcast). 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