Yes, because electromagnets can lose their magnetism.
No, electromagnets are stronger than bar magnets.
?? lol i dont know what electro magnets u have been using! if it is a homemade electro magnet, try increasing the coils in the wire ro the power u are putting into it. does the bar magnet (permanent magnet) have a larger surface area than the electro one? also, you do know that the magnetic potential of electro and permanent magnets vary right? they use electro magnets in junk yards that are capable of lifting scrap cars with eaaase
circular because you can find small circular magnets called "rare earth super magnets" at the store called princess auto
One key difference between a bar magnet and a horseshoe magnet is their shape. Bar magnets are long and rectangular, while horseshoe magnets are U-shaped. Another difference is their magnetic field strength, with horseshoe magnets typically having a stronger magnetic field at the poles compared to bar magnets.
Electromagnets and bar magnets both produce magnetic fields. They can attract or repel other magnetic materials, and the strength of their magnetic field depends on the strength of the current flowing through the electromagnet or the material of the bar magnet. Additionally, both electromagnets and bar magnets can be used in a wide range of applications, from speakers and motors to magnetic levitation systems.
An electro-magnet can be switched on & off - a bar magnet is 'permanent' Think of a scrap-yard. If the magnet they use to pick up huge quantities of metal were permanent, they'd have to manually remove every piece. With an electro-magnet, they simply turn the power on to pick up a load, and off when they want to release it. You can make your own electro-magnet with a battery, some wire and a large nail.
The strength of a magnet, whether a ring or a bar, depends on several factors including the material, size, and shape. Generally, bar magnets can be designed to have stronger magnetic fields in specific applications, while ring magnets can provide a more uniform magnetic field. In practical use, the effectiveness of each type often depends on the specific requirements of the application, such as space constraints or the need for a concentrated magnetic field. Thus, it's not inherently about one being stronger than the other, but rather which is more suitable for a given purpose.
Not necessarily.
The strength of a magnet depends on its size, material, and design rather than its type. Generally, horseshoe magnets are designed to have a concentrated magnetic field, making them stronger than typical bar magnets of the same size. Ring magnets can also be powerful, especially if made from strong materials like neodymium, but their strength varies widely based on dimensions and specific applications. Thus, it's essential to consider these factors rather than just the type of magnet.
A magnets pull is strongest at the poles.
You now have 2 bar magnets, each with half the magnetic force of the original.
Bar magnets are already magnetized. They don't need to add wire and electricity.