answersLogoWhite

0

🧪

Magnetism

Magnetism is simply an abstraction that people use for the changes in electromagnetic force created by the motion of electric charges. There are different types of magnetism that include electromagnetism, ferromagnetism, paramagnetism, and diamagnetism. To learn more and share your knowledge of magnetism and its types, ask and answer questions here.

4,020 Questions

What happens when a horse shoe magnet is dipped in iron fillings?

When a horseshoe magnet is dipped in iron filings, the iron filings become magnetized and align themselves along the magnetic field lines emitted by the magnet. The filings cling to the magnet, visually demonstrating the shape and strength of the magnetic field. This process highlights the magnetic properties of the iron filings, which temporarily become magnets themselves due to the influence of the horseshoe magnet.

What creates magnetic when energized?

When an electrical current flows through a conductor, such as a wire, it generates a magnetic field around it due to the movement of charged particles. This phenomenon is described by Ampère's law, which states that the magnetic field is directly proportional to the current. The magnetic field strength can be enhanced by coiling the wire into a solenoid or using ferromagnetic materials. When the current is turned off, the magnetic field dissipates.

What is a straight magnet called?

A straight magnet is commonly referred to as a "bar magnet." It has a uniform magnetic field and is characterized by having a north and south pole at each end. Bar magnets are often used in educational settings to demonstrate magnetic principles and can attract or repel other magnetic materials.

Is inconel 718 magnetic?

Inconel 718 is considered a non-magnetic alloy, primarily composed of nickel and chromium, which makes it resistant to magnetic fields. However, it can exhibit some slight magnetic properties due to its processing and heat treatment. Generally, its magnetic permeability is very low, making it suitable for applications where magnetic interference must be minimized. Overall, it is not classified as a magnetic material.

Are bottle tops magnetic?

Most bottle tops are not magnetic, as they are typically made of materials like aluminum or plastic, which do not possess magnetic properties. However, some bottle caps, particularly those made of steel, can be magnetic due to the metal content. If you're unsure, you can easily test with a magnet to see if a specific bottle top is magnetic.

What characteristic exists in magnet that does not exist in materials that does not exist in materials that lack magnetism?

A key characteristic of magnets is their ability to exhibit a magnetic field, which allows them to attract or repel other magnetic materials and influence charged particles. This magnetic field arises from the alignment of magnetic domains within the material, a feature absent in non-magnetic materials where such alignment does not occur. Additionally, magnets have a north and south pole, a property not found in non-magnetic substances.

How is it that honeybees rainbow trout and homing pigeons use magnetism?

Honeybees, rainbow trout, and homing pigeons all utilize Earth's magnetic field for navigation and orientation. Honeybees have magnetite-based receptors that help them detect magnetic fields, aiding in foraging and hive location. Rainbow trout can sense magnetic fields through specialized cells, which assists them in migrating and finding their spawning grounds. Homing pigeons possess magnetoreceptors in their beaks, allowing them to navigate accurately over long distances using the Earth's magnetic cues.

What is a magnetic insolator?

A magnetic insulator is a material that exhibits magnetic ordering while simultaneously being an electrical insulator. These materials can block the flow of electric current due to a high resistivity, yet maintain magnetic properties like ferromagnetism or antiferromagnetism. Magnetic insulators are important in various applications, including spintronic devices, where they can influence the spin of electrons without conducting electricity. Examples include materials like yttrium iron garnet (YIG) and certain oxides.

Is gray iron magnetic?

Yes, gray iron is generally considered to be magnetic. It contains a high amount of carbon and graphite, which can influence its magnetic properties. While it is not as magnetic as some other ferrous materials, gray iron can still exhibit magnetic behavior, especially when subjected to external magnetic fields. However, its magnetic properties may vary based on the specific composition and processing of the iron.

Will a magnet ruin a bus pass?

Yes, a magnet can potentially ruin a bus pass if it contains a magnetic strip. The strong magnetic field may disrupt or erase the data stored on the strip, rendering the pass unusable. However, if the bus pass is made of a different material, such as a smart card with an embedded chip, it may not be affected. It's best to keep magnets away from any card with a magnetic strip.

Would two iron bars attract?

No, two iron bars would not attract each other under normal circumstances. Iron is a ferromagnetic material, meaning it can be magnetized, but two unmagnetized iron bars will not exhibit a magnetic attraction. However, if one or both bars are magnetized, they can attract or repel each other depending on their magnetic orientation.

What must happen in order for the nail to be magnetized?

For a nail to be magnetized, it must be exposed to a strong magnetic field, which aligns the magnetic domains within the material. This alignment can occur through direct contact with a magnet, rubbing the nail with a magnet, or placing it in a solenoid with an electric current. Once the domains are aligned, the nail retains its magnetism until it is demagnetized by heat, impact, or a reverse magnetic field.

Why the magnetic pole gap is adjusted to 1 cm in a Hall effect experiments?

In Hall effect experiments, the magnetic pole gap is often adjusted to 1 cm to optimize the magnetic field's uniformity across the sample being tested. A consistent gap ensures that the Hall voltage measured is directly proportional to the magnetic field strength and the current flowing through the conductor. This standardization helps minimize measurement errors and improves the accuracy of the results, allowing for better analysis of the material's properties. Additionally, a 1 cm gap is practical for balancing the trade-off between field strength and sample size.

What happens when a nail is placed near a magnet?

When a nail is placed near a magnet, it can become magnetized due to the magnetic field of the magnet. The magnet induces a magnetic alignment in the nail's iron atoms, causing the nail to exhibit its own magnetic properties. If the magnet is strong enough, the nail may even be attracted to the magnet, demonstrating the principle of magnetism in ferromagnetic materials. Once removed from the magnetic field, the nail may retain some magnetization but will generally lose most of it over time.

What will happen to a piece of aluminium when a magnet comes near it?

When a magnet comes near a piece of aluminum, there will be no significant magnetic attraction or repulsion, as aluminum is a non-ferromagnetic material. It does not have a permanent magnetic field and does not respond to magnetic fields in the same way that ferrous materials do. However, a strong magnet may induce a very weak magnetic field in aluminum, leading to a slight interaction, but it will not stick to the magnet.

What will be the force acting on the electron due to magnetic field of the solenoid when an electron is moving with a velocity V along the axis of a long straight solenoid carrying a current I?

When an electron moves along the axis of a long straight solenoid carrying a current I, the magnetic field inside the solenoid is uniform and directed along the axis. According to the Lorentz force law, the force acting on a charged particle moving in a magnetic field is given by ( F = q(\mathbf{V} \times \mathbf{B}) ), where ( \mathbf{V} ) is the velocity of the electron and ( \mathbf{B} ) is the magnetic field. Since the velocity of the electron is parallel to the magnetic field in the solenoid, the cross product ( \mathbf{V} \times \mathbf{B} ) equals zero. Thus, the force acting on the electron due to the magnetic field of the solenoid is zero.

Where is Reva placed an iron nail close to a magnet. What happened?

When Reva places an iron nail close to a magnet, the magnet's magnetic field induces magnetism in the nail. This causes the nail to become a temporary magnet, aligning its own magnetic domains with the external magnetic field. As a result, the nail is attracted to the magnet and will stick to it until removed from the magnetic field.

What is the name given to a group of metals that attract a magnet and will rust?

The group of metals that attract a magnet and can rust is commonly referred to as ferrous metals. This category includes iron and its alloys, such as steel, which are magnetic and prone to oxidation when exposed to moisture and oxygen, resulting in rust. Non-ferrous metals, on the other hand, do not have these properties.

What happens when you dip a bar magnet in a pile of pins?

When you dip a bar magnet into a pile of pins, the magnetic field of the bar magnet induces magnetism in the pins, causing them to become temporarily magnetized. As a result, the pins are attracted to the magnet and will stick to it. This phenomenon occurs because the magnetic domains within the pins align with the magnetic field of the bar magnet, allowing them to respond to the magnetic force. Once removed from the magnet, most pins will lose their magnetism and return to their non-magnetic state.

Is hastelloy x magnetic?

Hastelloy X is generally considered to be non-magnetic. It is a nickel-chromium-molybdenum alloy that exhibits excellent corrosion resistance and high-temperature strength. While some nickel-based alloys can have slight magnetic properties, Hastelloy X is typically classified as non-magnetic in its standard form. However, its magnetic properties may vary slightly depending on the specific processing and heat treatment it undergoes.

Which magnet is stronger a ring or bar?

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.

What can a student do to increase the force of attractionof this magnet on the iron metal block?

To increase the force of attraction of a magnet on an iron metal block, a student can bring the magnet closer to the block, as the magnetic force decreases with distance. They can also increase the strength of the magnet by using a stronger magnet or by magnetizing the iron block if it is not permanently magnetized. Additionally, ensuring that the surfaces of the magnet and the iron block are clean and free from debris can enhance the magnetic connection. Lastly, using a ferromagnetic material that is more responsive to magnetism can also improve attraction.

Are magnets attracted to steel wool?

Yes, magnets are attracted to steel wool because steel wool is made of fine strands of steel, which is a ferromagnetic material. When a magnet is brought close to steel wool, the magnetic field causes the steel fibers to become magnetized, resulting in an attractive force. This property allows for the effective use of magnets in various applications involving steel wool.

How does a suspended magnet come to rest?

A suspended magnet comes to rest when the magnetic forces acting on it are balanced by other forces, such as gravitational and frictional forces. When the magnet is freely suspended, it will rotate until its magnetic field aligns with the Earth's magnetic field, reaching a position of equilibrium. Additionally, any oscillations or movements will gradually diminish due to air resistance and internal friction, leading the magnet to settle in its most stable orientation.

What happens when 2 magnets with like poles are placed next to each other what will happen.?

When two magnets with like poles (either both north or both south) are placed next to each other, they will repel each other. This repulsion occurs because the magnetic fields of the like poles push against each other, creating a force that keeps the magnets apart. As a result, the magnets will tend to move away from one another rather than attract.