Electromagnets are generally safe for their various uses, but you need to take precautions depending on the context in which you use them. Very, very powerful magnets and electromagnets that come into contact with or incloseproximity to laptops or computers can damage their hard drives, but, for...
Two of the more important things held on the ground by gravity are the atmosphere and the water in the oceans, lakes and rivers. Without gravity, the air in the atmosphere has no reason to hang around, and it would immediately leap into space. This is the problem the moon has -- the...
Unlike alloys like alnico, the magnetism of electromagnets ceases as soon as the electricity stops flowing, which can be very handy for an array of the modern uses of magnets. What do we use magnets for? In the modern world, we use magnets in almost all aspects of our lives, from ourmo...
Uses of Electromagnets Electromagnets are ubiquitous and have many uses. A common and very simple example of an electromagnet, specifically a solenoid, is a speaker. The varying current through the speaker causes the strength of the solenoidal magnetic field to increase and decrease. As this happens...
In order for the speed of light to be constant, even if the light is "launched" from a moving object, only two things can be happening. Either something about our notion of distance and/or something about our notion of time must be skewed. As it turns out, both are skewed. Remember,...
However, instead of lenses made of glass, the transmission electron microscope uses electromagnets as lenses, as do all electron microscopes. The electromagnets bend the electron beam to magnify and focus an image onto a viewing screen or photographic film. [#paragraph7]Electron microscopes have ...
The applications of electromagnets are nearly countless. Faraday's Law of Induction forms the basis for many aspects of our modern society including not only electric motors and generators, but electromagnets of all sizes. The same principle used by a giant crane to lift junk cars at a scrap ...
If you've readHow Electromagnets Work, then you know that an electromagnet is a coil of wire, usually wrapped around a piece of magnetic metal, such asiron. Running electrical current through the wire creates a magnetic field around the coil, magnetizing the metal it is wrapped around. The ...
Some common analog signals are the human voice, the disturbances made by musical instruments and the sounds made by other living things. As an... Learn more about this topic: Analog vs Digital Signal | Definition, Types & Examples from ...
Ordinary (optical) microscopes use a series of glass lenses to magnify tiny objects, while super-powerful electron microscopes use electromagnets to bend electron beams that help us see in even more detail. Movie projectors and projection televisions use lenses to convert small movie pictures into ...