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mitocondrio
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How can you have a simple coil connected to a battery without having a short circuit in it? How do they make electromagnets that don't heat the battery?
Thanks :)
Thanks :)
Philip Wood said:The wire is coated with insulation (except, of course, at the ends, where the connections are made). So it doesn't matter if the turns touch each other; the current cam't cut corners.
Philip Wood said:It's all a matter of design. In general, motors use thicker wire and less of it than you'd use for an electromagnet designed to run for more than a few seconds on a d.c. supply.
[Can't resist saying to Drakkith that he's right, of course, but making the resistor out of extra wire added to the electromagnet coil will have the advantage of making the electromagnet stronger! Just teasing.]
An electromagnet does not create a short circuit because it has a specific design that allows for the flow of electricity through its coils without causing a disruption in the circuit. The wires of an electromagnet are wrapped around a core material, which helps to concentrate the magnetic field and prevent the flow of electricity from escaping.
An electromagnet prevents a short circuit by using a core material, often made of iron or steel, which concentrates the magnetic field and keeps the flow of electricity contained within the coils. Additionally, the wires are often coated with an insulating material to further prevent any leakage of electricity.
While an electromagnet is designed to prevent short circuits, it is still possible for one to occur. This can happen if the wires become damaged or if the insulation becomes worn, allowing for electricity to escape and potentially cause a short circuit. Regular maintenance and proper usage can help prevent this from happening.
In general, it is safe to touch an electromagnet as long as it is not connected to a power source. However, it is important to be cautious and avoid touching the exposed wires of an electromagnet, as this can still pose a risk of electric shock.
Electromagnets are used instead of permanent magnets because they offer more control and versatility. The strength of an electromagnet can be adjusted by controlling the flow of electricity, while the strength of a permanent magnet is fixed. This makes electromagnets useful in a variety of applications, such as in motors, generators, and medical devices.