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Hi,
Not really. All they can do is limit the voltage and current going into the coil. The heat is a byproduct of the `transformer action` and all coils will heat up some. If you're giving it too much voltage, a resistor could help to bring the heat level down to an acceptable level if it's running too hot.
If you're using DC for your magnetic coil, take the available voltage, then subtract the operating voltage of the coil and divide that by the current of the coil, which will then give you the value of the resistor you need. Example: 12 volts (available) - minus coil voltage, divided by the coil's current in milliamps (or amps), which equals the value of resistor in ohms.
As for the power rating of the resistor (in watts) just multiply the available voltage times the current of the coil, giving you a rating in watts, and then pick a resistor with at least that much power handling capability or go a size larger if you wish. (This isn't the exact formula, but it's close enough to take care of your needs, I think.)
Hope this helps,
Cubby
What else can I help you with?
Will Dragging a magnet through a wire coil will create electricity?
Yes. That peculiar action weill create a current in the coil for as long as you keep the magnet moving.
Can computer damage caused by a magnet be reversed?
Actual damage by a magnet to a computer is extremely rare, and thus it is impossible to gauge what type of damage you are referring to. Data erased from a disk by a magnet is likely not recoverable. You should be able to reinstall the operating system to the disk, but depending on the intensity of the magnetic field, the disk may need a passover with a degaussing coil to remove a strong magnetic field. Magnetization to a CRT monitor (generally resulting in distorted colors) can usually be fixed by running the monitor's built-in degaussing coil (selectable in its OSD menu). A particularly strong field may require several degaussing sessions (the coil built in can only be run once every five minutes or so), or require the use of a dedicated degaussing coil. Any television technician should have such a coil.
What are some school supplies that are magnetic?
Some common magnetic school supplies include magnetic dry-erase boards, magnetic whiteboard markers, and magnetic clips or holders for papers. Additionally, there are magnetic pencil cases and magnetic bookmarks that can help keep items organized. These supplies offer convenience and can enhance the classroom experience by allowing easy attachment to metal surfaces.
Is a magnetic disc affected by a theft detection device or magnetic theft alarm sensor?
Yes, a magnetic disc like a hard drive or floppy disk can be affected by a theft detection device or magnetic theft alarm sensor due to the strong magnetic fields they emit. This can potentially cause data loss or corruption on the magnetic disc. It is best to keep such devices away from magnetic fields.
List 5 different ways magnets are used in every day life?
Refrigerator magnets hold up notes and photos. Magnetic clasps are used in jewelry for easy fastening. Magnetic door latches keep doors closed. Magnetic compasses help with navigation. Magnetic closures on bags and purses keep items secure.
In this electric motor an electric current causes the coil to rotate changing?
In this electric motor, an electric current flowing through the coil interacts with the magnetic field, generating a force that causes the coil to rotate. This rotation changes the direction of the magnetic field around the coil, which in turn causes the coil to keep rotating in the same direction.
How you can demagnetize materials?
A magnet has magnetic properties because the dipoles of the atoms are lined up in a single direction. To demagnetize it, you must scramble the dipoles out of alignment. First, heat the magnet past the Curie point (the temperature at which it loses its magnetic properties until cooled). Strike it on the ends of the magnet with a hammer. When cooled, it will no longer be magnetized.
How can I increase the strength of a magnet?
To increase the strength of a magnet, you can do the following: Increase the number of turns in the coil of wire around the magnet. Use a stronger magnetic material for the magnet. Increase the current flowing through the coil of wire. Increase the number of coils in the wire around the magnet. Keep the magnet in a strong magnetic field when not in use.
Why does the fan work only on high and keep blowing resistors on low?
Had one that the fan motor was going bad Was burning out resistors with high draw
Ojects that keep their magnetic properties for a long time are called?
magnetic
Why you keep diskette away from magnetic sources?
why should you keep diskettes away from magnetic sources
Why does a thermostat turn a house's heating unit on and off?
The short answer is that it's what it was designed to do. It is so designed in order to keep an indoor area at a constant, comfortable temperature. Inside of the thermostat is a coil. The coil expands and contracts with the temperature. When the coil expands to the point it's supposed to, it makes contact with an element detached from the coil, thus allowing an uninterrupted circuit to be made, which in allows power to get to the HVAC system.
How rotating the coil causes the lamp to light?
Well it is according to faraday's laws of electromagnetic induction. Whenever a coil rotates in a magnetic field,magnetic flux passing through the coil will get changed, and faradays first law states that whenever there is a change in magnetic flux linked with the coil, a emf is induced in it. So due to this emf bulb will light up. Well if you want the change in flux to be explained in more general way I can explain it like this: Suppose it is raining and you have kept a bucket to accumulate the rain water in it. Initially keep the bucket vertical, so maximum amount of rain water will drop into bucket. Now start tilting the bucket, the waterdrops entering the bucket will start decreasing. now make the bucket horizontal, so now no drop will enter into the bucket. So number of water drops entering the bucket depends on inclination of bucket. Here rainddrop is similar to magnetic flux and bucket is similar to coil. So as you rotate the coil, flux linked with the coil changes.
What is range of wire wound resistors?
There is no set range for these types of resistors. The biggest thing to keep in mind is the heat that is generated by the resistance and the applied voltage. The device should be large enough to dissipate this heat.
How do you know if a coil is working on a car?
Short answer: Fires the spark plugs. The ignition coil is nothing more that an electrical transformer. It contains both primary and secondary winding circuits. The coil primary winding contains 100 to 150 turns of heavy copper wire. This wire must be insulated so that the voltage does not jump from loop to loop, shorting it out. If this happened, it could not create the primary magnetic field that is required. The primary circuit wire goes into the coil through the positive terminal, loops around the primary windings, then exits through the negative terminal. The coil secondary winding circuit contains 15,000 to 30,000 turns of fine copper wire, which also must be insulated from each other. The secondary windings sit inside the loops of the primary windings. To further increase the coils magnetic field the windings are wrapped around a soft iron core. To withstand the heat of the current flow, the coil is filled with oil which helps keep it cool. The ignition coil is the heart of the ignition system. As current flows through the coil a strong magnetic field is built up. When the current is shut off, the collapse of this magnetic field to the secondary windings induces a high voltage which is released through the large center terminal. This voltage is then directed to the spark plugs through the distributor.
Why does the igntion coil keep burning out on your 5.4L Expedition?
if water is getting on the coil pack. that will cause it to burn out.
Why no volt coil is made of thin wire in starter?
because of high voltageAnswer.The purpose of a no-volt coil is to cut off the power supply from the motor if the voltage supply drops to below a safe pre-determined value.So, alot of thin wires so that a strong magnetic flux is produced which will keep its armature attracted to the Iron point.
