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the electromagnet and the permanent magnet -- interact with each other as any two magnets do. The positive end of the electromagnet is attracted to the negative pole of the permanent magnetic field, and the negative pole of the electromagnet is repelled by the permanent magnet's negative pole. When the electromagnet's polar orientation switches, so does the direction of repulsion and attraction. In this way, the alternating current constantly reverses the magnetic forces between the voice coil and the permanent magnet. This pushes the coil back and forth rapidly, like a piston.
When the coil moves, it pushes and pulls on the speaker cone. This vibrates the air in front of the speaker, creating sound waves. The electrical audio signal can also be interpreted as a wave. The frequency and amplitude of this wave, which represents the original sound wave, dictates the rate and distance that the voice coil moves. This, in turn, determines the frequency and amplitude of the sound waves produced by the diaphragm.
What else can I help you with?
What are magnets and springs used for?
Magnets for suspension springs for clocks
Which is most often used in magnets aluminum or lead?
Aluminum is not typically used in magnets. Lead is also not commonly used in permanent magnets due to its low magnetic properties. Instead, materials like iron, nickel, and cobalt are more frequently used in magnets.
What metal is used in low melting alloys and magnets?
Several different metals can be used in magnets. Iron is perhaps the most common metal used in permanent magnets, but alloys such as Alnico (Aluminum, Nickel, and Cobalt) can also make very strong permanent magnets.
Are magnets used in calculators?
Yes, magnets are commonly used in calculators to help hold batteries in place or to secure the calculator cover. Magnets can also be used in certain types of stylus pens for touchscreen calculators.
Why only irons are used as magnets?
actually nickel, cobalt, and several rare earths are used as magnets too, but iron is the cheapest.
Do stereos use magnets?
yes
Which four things have magnets in them?
* Stereos * Clip holder * Brakes of a train * Generators
Example of a sentence using the word stereos?
stereos = plural of stereo - here stereo means a device for playing vinyl records (??). We have two stereos in our house. Stereos used to be popular in the 1970's
What every day things use magnets?
Some everyday things that use magnets include refrigerator doors, speakers in electronic devices, magnetic clips and closures, and magnetic therapy devices. Magnets are also used in electric motors, credit cards, and MRI machines.
What is the possessive form of stereos?
The possessive form of the plural noun stereos is stereos'.example: The stereos' prices are reasonable.
Are personal stereos bad for your health?
not if used resposably
Plural form of stereo?
The plural form of stereo is stereos.
Why are magnets usefull?
Magnets are used in compasses.
How can magnets be used to help with recyling?
how can magnets be used to help with recycling
How can magnets be used to help us?
how can magnets be used to help with recycling
Which is mostly used in magnets magnesium or lead?
Lead is used in magnets.
Where can I sell used car stereos?
Craig's List or Ebay
