How do radios use magnets

Is this true? I want to replicate the experiment with 2 magnets like this one:. Improve this question. AzulShiva AzulShiva 8 8 bronze badges. Add a comment. Active Oldest Votes. Improve this answer. McGrew S. McGrew It's about a magnetic field created by two opposing magnets forced together with a few hundred Newtons of force. Three people who know what they are talking about have now told you the same thing. Whoever made this suggestion to you does not understand electromagnetism.

Sign up or log in Sign up using Google. Sign up using Facebook. This is possible because inside transmitters are wires that allow negatively charged particles, called electrons, to flow through them, which makes an electrical current. When current flows within a wire, it generates an electromagnetic field around the wire. This electromagnetic field radiates out of the antenna in all directions, creating invisible radio waves.

When the electromagnetic radio waves hit a receiving antenna, or receiver, such as a radio, it generates a current inside of a wire in the receiver. The reverse process of what happened in the transmitter when the current generated the electromagnetic field in the first place. The receiver then processes the current back into the transmitted information, which, for a radio, allows you to hear music or other broadcasts.

Some materials can block the radio waves that the transmitter generates, which can be tested by seeing whether a receiver can process and respond to information sent by a transmitter. Check that the car runs well on the open space that you will be using. Every covering should be loose enough so you can still operate the remote control buttons through it. Make sure that the remote control is completely and securely covered so that there are not any openings or holes in the covering, and that it is covered loose enough so that you can still operate the controls.

Does it work? Does the car move at all? Test to make sure that the car still works when it is not covered with any material. For which materials does the car still operate, and for which materials does the car not operate? Why do you think this is? You can try this activity again but using other remote control devices, such as your TV or stereo remote. How do different wireless devices respond? Do you think they use similar or different types of waves?

The heat kills the cancer cells without harming healthy organs. Though it may not be obvious, most homes contain many magnets. Refrigerator magnets hold papers, bottle openers, and other small items to the metal refrigerator door. A pocket compass uses a magnetic needle to show which way is north. Vacuum cleaners, blenders and washing machines all have electric motors that work by magnetic principles. Many computers use magnets to store data on hard drives. Magnets alter the direction of magnetic material on a hard disk in segments that then represent computer data.

The small speakers found in computers, televisions, and radios also use magnets; inside the speaker, a wire coil and magnet converts electronic signals into sound vibrations. Magnets offer many benefits to the industrial world.

Magnets in electric generators turn mechanical energy into electricity, while some motors use magnets to convert electricity back into mechanical work. In recycling, electrically-powered magnets in cranes grab and move large pieces of metal, some weighing thousands of pounds.

Mines use magnetic sorting machines to separate useful metallic ores from crushed rock. In food processing, magnets remove small metal bits from grains and other food. Farmers use magnets to catch pieces of metal that cows eat out in the field. However, the early Chinese are believed to have first used them in magnetic compasses for navigation purposes.

They found out magnets could direct needles and correlated with the north pole, and used that information to navigate.