Glossary of magnetic terminology
How to navigate the world of neodymium magnets?
Warm greetings to our detailed glossary dedicated to the fascinating world of neodymium magnets. As a leading expert in providing top-notch magnetic solutions, we know how essential it is to have a solid knowledge about the terminology in this specialized field. This glossary has been thoughtfully crafted to serve as an invaluable source of information for all those interested who is curious about magnets – whether you are an specialist, a hobbyist, or an enthusiast the knowledge of magnets.
In our glossary, you will find accessible and comprehensive explanations of important notions and subjects related to neodymium magnets. From the basics of field mechanics and flux density, to behavioral trends and material grades, each definition has been designed to expand your understanding and simplify even the most complex ideas. If you are exploring industrial applications, performing DIY projects, or simply learning magnetism, this glossary aims to support your learning.
Discover the amazing world of neodymium magnets effortlessly. Expand your knowledge, gain fresh perspectives, and unlock the potential of these innovative materials, understanding terms and theories that describe their operation and utility. Consider this glossary as your guide in delving into the dynamic landscape of magnetic technology.
Litera: A
The air gap is the space filled with air that separates a magnet from a ferromagnetic material. A larger air gap weakens the magnetic field. Formula: B = μ0(H - M), where:
B - magnetic induction,
μ0 - permeability of free space,
H - magnetic field strength,
M - magnetization.
B - magnetic induction,
μ0 - permeability of free space,
H - magnetic field strength,
M - magnetization.
An anisotropic material, e.g., neodymium magnets, has properties that vary with direction. Magnets with a preferred magnetization direction are stronger than isotropic magnets, but they can only be magnetized along a specific axis.
Annealing is a heat treatment process in magnetic materials. It is performed at high temperatures, usually in a vacuum to prevent oxidation. Annealing improves the structure and allows for better performance in applications.
Axial magnetization means that the magnetic poles are located at opposite ends of the magnet, and the magnetic field lines run along the length of the magnet. This configuration is commonly used in ring-shaped and spherical magnets. Formula: Bz = (Br/2) × [(L + 2z) / (L² + 4z²)0.5 - (L - 2z) / (L² + 4z²)0.5].
Litera: B
Magnetic induction B is the field intensity passing through a surface. It is measured in teslas. Formula: B = μ0(H + M), where:
μ0 - permeability of free space,
H - applied magnetic field,
M - magnetization.
μ0 - permeability of free space,
H - applied magnetic field,
M - magnetization.
The hysteresis loop is a graphical representation of the relationship between magnetic induction (B) and field strength. It helps determine properties like coercivity. The hysteresis loop is a fundamental tool in evaluating materials used in electric motors.
Remanent induction Bd is the remaining magnetization in a material after the magnetizing force is removed. It is measured or gauss and represents the material's ability to retain magnetism.
The slope of the operating line, denoted as Bd/Hd, is the ratio of remanent induction to demagnetizing force. Formula: Bd/Hd = (Br - Hd) / Hd. This is a key parameter in the design of magnetic circuits.
Bg represents the average magnetic induction in the air gap. It is a critical parameter in designing devices such as sensors and actuators. Formula: Bg = Φ / A, where:
Φ - magnetic flux,
A - air gap area.
Φ - magnetic flux,
A - air gap area.
Litera: C
The C.G.S. system of units is one of the oldest measurement systems. Despite being succeeded by the MKSA (SI) system, C.G.S. is still relevant in magnetic data presentations. This system includes units for magnetizing force and magnetic induction.
A closed circuit refers to a configuration where there are no breaks or interruptions. It uses high-permeability materials to ensure minimized flux losses. Such circuits are essential in applications requiring controlled magnetic fields.
Coercive force, denoted as Hc, is the necessary strength to reduce magnetic induction to zero. This parameter measures the durability of its magnetic properties. Formula: Hc = -M/χ, where:
M - magnetization,
χ - magnetic susceptibility.
M - magnetization,
χ - magnetic susceptibility.
High coercivity indicates the durability of a material's magnetic properties. It also affects magnetic stability under varying conditions.
Intrinsic coercivity, denoted as Hci or iHc, represents the ability to maintain its magnetic properties. It measures the demagnetizing force required to reduce internal magnetization to zero. Materials with high coercivity offer magnetic stability.
Curie temperature is the point at which transition to a paramagnetic state. Beyond this temperature, the material ceases to exhibit strong magnetic behavior. Formula: Tc = (2kB / μ0) × J02 / χ, where:
kB - Boltzmann constant,
J0 - magnetic moment.
kB - Boltzmann constant,
J0 - magnetic moment.
Litera: D
Demagnetization refers to the process of reducing or eliminating magnetization. Methods include or employing demagnetization techniques such as degaussing. This process is essential in applications requiring precise control of magnetization.
The demagnetization curve illustrates the relationship through cycles of magnetization and demagnetization. It reveals the material's hysteresis characteristics, including stability of magnetic properties. This tool is vital for analyzing magnetic material characteristics.
Demagnetization force refers to the opposing magnetic field that induces demagnetization. This force allows for controlling the level of magnetization in materials.
A demagnetized material is one where remanent induction has been reduced to zero. This state is achieved through applying alternating magnetic fields. Demagnetization is important in eliminating unwanted magnetic effects.
approximately 7.5 g/cm³, is one of the key parameters defining its magnetic properties. Density can be easily calculated using the formula:
ρ = m / V, where:
ρ - density (in g/cm³ or kg/m³),
m - mass of the magnet (in grams or kilograms),
V - volume of the magnet (in cm³ or m³).
Example: For a magnet with a mass of 150 g and a volume of 20 cm³, the density is:
ρ = 150 / 20 = 7.5 g/cm³.
Understanding density allows for better parameter selection in various applications.
ρ = m / V, where:
ρ - density (in g/cm³ or kg/m³),
m - mass of the magnet (in grams or kilograms),
V - volume of the magnet (in cm³ or m³).
Example: For a magnet with a mass of 150 g and a volume of 20 cm³, the density is:
ρ = 150 / 20 = 7.5 g/cm³.
Understanding density allows for better parameter selection in various applications.
Diamagnetic materials exhibit no permanent magnetic moment. When exposed to an external field, they generate an opposing field. This behavior results from creating a counteracting magnetic field.
Diameter refers to the measured in a straight line across the surface of a disc, ring, or spherical magnet. It is a critical parameter in designing magnetic systems.
Diametrically magnetized magnets have creating a circular magnetic field pattern. They are commonly used in applications requiring unique magnetic field configurations.
Dimensional tolerance specifies the range of variation in magnet size. It is crucial for precise fitting.
Dimensions refer to the measurable physical properties of a magnet. Accurate dimensioning is key to ensuring the proper functionality of magnetic systems.
The direction of magnetization defines the orientation of magnetic domains. This is a critical feature that affects the material's magnetic behavior.
Domains are microscopic regions where magnetic moments align in the same direction. They can be altered by external magnetic fields, temperature, or stress.
Litera: E
Eddy currents are electrical currents induced in conductive materials when exposed to fluctuations in the magnetic field. They cause efficiency issues. The use of laminated cores or magnetic shielding minimizes their negative effects.
An electromagnet is a magnet created by passing an electric current through a conductor. Adjusting the current allows control over the magnetic field. Electromagnets are applied in such as motors, generators, or MRI systems.
The energy product is a measure of the energy stored in a magnetic material. It is calculated as the multiplication of two parameters from the demagnetization curve. Expressed in MGOe (Mega Gauss Oersteds) or kJ/m³, it is an essential measure for evaluating their efficiency in applications.
Measured as the product of the material's remanence and coercivity. Magnets with higher energy products deliver better efficiency.
Litera: F
Ferrites are substances primarily composed of iron oxide (Fe2O3). They combine low electrical conductivity with high magnetic permeability. Used in transformers, inductors, and telecommunication devices.
A ferromagnetic material is characterized by strong magnetic properties. In such materials, atoms generate a strong magnetic field. Examples include and their alloys. These materials are fundamental due to their ability to retain magnetization.
Flux density, denoted as B, defines the strength of the magnetic field. Measured in Teslas (T) or Gauss (G), it is a crucial parameter for evaluating magnet performance.
A fluxmeter is used to measure magnetic induction (B). It employs various technologies such as to provide precise measurements. It is a critical engineering tool.
Litera: G
Gauss is a unit of magnetic induction. One Gauss (G) equals 10^-4 Tesla (T). Commonly used in laboratory applications.
A Gauss meter is a instrument used to determine induction at points in space. It uses Hall effect sensors. Helpful in magnetic diagnostics.
The Gilbert is a unit of magnetomotive force (mmf). One Gilbert represents the field strength needed to produce magnetic flux in a specific circuit.
The grade of a magnet refers to performance and suitability for specific applications. Higher grades offer greater resistance to temperatures and demagnetizing forces.
Litera: H
Used for measuring magnetic fields and detecting position. Hall sensors are widely utilized in electronics, such as ABS systems in vehicles.
Coercive force (Hc) represents the magnetic field strength needed to reduce a material's residual induction (Br) to zero. Expressed in oersteds (Oe) or kiloamperes per meter (kA/m), higher Hc values indicate resistance to external influences.
Hd denotes the force needed to magnetize a material and retain that state after the field is removed. Measured in oersteds (Oe) or kiloamperes per meter (kA/m).
A high field gradient magnet produces strong and rapidly changing magnetic fields. Applications include and scientific research requiring advanced field parameters.
Hm represents the maximum applied magnetic field strength before a material reaches saturation. It is critical for assessing stability and operational limits of magnetic components.
A homogeneous field is characterized by constant strength and direction. It is such as spectroscopy or device calibration.
A horseshoe magnet has its poles placed close together. and applications requiring focused magnetic fields.
Net effective magnetizing force (Hs) refers to the field needed to fully magnetize a material to saturation. Measured in oersteds (Oe) or kiloamperes per meter (kA/m).
The hysteresis graph, also called a permeameter, illustrates changes in magnetic induction (B) as a function of magnetizing force (H). It is used in quality control, energy loss analysis.
The hysteresis loop is a graphical representation of the relationship between magnetic induction (B) and magnetizing force (H). It provides information about the behavior of materials during magnetization cycles.
Hysteresis refers to a characteristic of magnetic materials. Hysteresis loss is the energy lost as heat during magnetization and demagnetization cycles. crucial for designing transformers and motors.
Litera: I
Inner diameter (ID) refers to the distance between the inner surfaces of an object. It is an essential parameter in magnetic circuit design.
Magnetic induction (B) describes the strength of the magnetic field in a material or space. It is measured in standard SI units. critical in characterizing magnetic materials.
Irreversible losses refer to the effects of high temperatures, mechanical stress, or demagnetizing fields. They result in challenges in long-term magnet usage.
An isotropic material exhibits the same magnetic properties in all directions. Often compared to anisotropic materials with direction-dependent properties.
Litera: K
A keeper is a soft iron or ferromagnetic element placed on or between the poles of a permanent magnet. It provides a low magnetic resistance path for flux. Used primarily with historical magnet models.
Kilogauss (kG) is a unit of magnetic field measurement. 1 kilogauss = 1000 Gauss. and industrial sectors requiring strong magnetic fields.
Litera: L
The load line represents the operating points of a magnetic material on the demagnetization curve. useful for optimizing magnetic applications.
Lodestone is the first known natural magnet. possesses unique properties due to its magnetic domain alignment.
Litera: M
A magnet is a material attracting or repelling other magnetic materials. widely used in electronics, motors, generators, and magnetic storage devices.
A magnetic assembly is a system comprising various magnetic components. Used in sensors, magnetic separators.
The magnetic axis is an imaginary line within a magnet where the magnetic field is most concentrated or intense. essential for analyzing the magnet's behavior and interactions with other magnetic components.
A magnetic circuit is analogous to an electrical circuit. Comprises magnetic materials, air gaps, and other components.
Magnetic energy is the energy stored within a magnetic field. related to the strength of the magnetic field and the volume of space it occupies.
A magnetic field (B) is an area where magnetic materials or electric charges experience a magnetic force. Represented by magnetic flux lines.
Magnetic field strength (H) is a measure of the magnetizing force applied to a magnetic material. Depends on the current flowing through the conductor.
Magnetic flux is a measure of the total magnetic field in a given region. key in analyzing magnetic circuits and induction phenomena.
Magnetic flux density, denoted as B, is a parameter describing the intensity of the magnetic field at a specific location. It represents the number of magnetic field lines intersecting a surface.
The equation for it is:
B = Φ / A
Where:
B: Magnetic flux density (Tesla, Gauss)
Φ: Magnetic flux (Weber)
A: Surface area (m²)
For example, with a magnetic flux of 0.01 Weber and an area of 0.1 m², the magnetic flux density is 0.1 Tesla.
Magnetic flux density is critical for designing devices like motors, generators, or magnetic sensors.
The equation for it is:
B = Φ / A
Where:
B: Magnetic flux density (Tesla, Gauss)
Φ: Magnetic flux (Weber)
A: Surface area (m²)
For example, with a magnetic flux of 0.01 Weber and an area of 0.1 m², the magnetic flux density is 0.1 Tesla.
Magnetic flux density is critical for designing devices like motors, generators, or magnetic sensors.
The hysteresis loop illustrates the behavior of magnetic materials during cycles of magnetization and demagnetization. Materials with a narrower loop have lower energy losses.
expressed in units like teslas (T) in the SI system or gausses (G) in the CGS system. Higher induction values indicate stronger magnetic fields.
A magnetic line of force, also known as a magnetic field line, is an imaginary curve representing the direction and shape of a magnetic field. lines form closed loops for most magnets.
A magnetic path refers to the route taken by magnetic flux in a magnetic circuit or system. A well-designed path ensures efficient magnetic energy transmission.
Magnetic permeability defines a material's ability to conduct magnetic flux. Materials with high permeability are more effective at concentrating magnetic fields.
Every magnet has a north and south pole. Pole polarity determines attraction and repulsion forces between magnets.
Magnetic saturation describes the maximum magnetic field intensity a material can achieve. It is also significant in designing magnetic circuits.
Magnetization refers to the result of aligning atomic or molecular magnetic moments in a preferred orientation. It can be achieved by exposure to a magnetic field, electric current flow, or contact with other magnets.
Magnetization is the process of imparting magnetic properties to a material by aligning its magnetic domains. Control over the magnetization process enables achieving optimal parameters.
A magnetization curve, also called a B-H curve or demagnetization curve, represents a graphical depiction of a material's magnetic properties. Provides critical insights into material characteristics, saturation, and magnetic stability.
Magnetized refers to the state of a material possessing a magnetic field or being magnetized. This state can be achieved through exposure to a magnetic field, contact with magnets, or electric current flow.
Magnetomotive force (mmf) is a measure of the difference in magnetic potential. Analogous to electromotive force (EMF) in electrical circuits.
In magnetism, material refers to a substance exhibiting magnetic properties or influenced by a magnetic field. Ferromagnetic materials like iron can be permanently magnetized.
Maximum energy product, denoted as BHmax, represents the peak capability of a magnet to store and release magnetic energy.
It is calculated using the equation:
BHmax = B × H
Where:
B: Magnetic flux density (Tesla)
H: Magnetic field strength (A/m)
For example, a magnet with B = 1 T and H = 600 kA/m achieves a BHmax of 600 kJ/m³.
High BHmax values are characteristic of neodymium magnets, making them indispensable for advanced industrial applications.
It is calculated using the equation:
BHmax = B × H
Where:
B: Magnetic flux density (Tesla)
H: Magnetic field strength (A/m)
For example, a magnet with B = 1 T and H = 600 kA/m achieves a BHmax of 600 kJ/m³.
High BHmax values are characteristic of neodymium magnets, making them indispensable for advanced industrial applications.
Maximum operating temperature (Tmax) is a crucial parameter for applications in high-temperature environments. Temperatures exceeding Tmax may result in material demagnetization.
Maxwell is a unit of magnetic flux named after James Clerk Maxwell. critical for historical and scientific magnetic applications.
Mega Gauss Oersteds (MGOe) is a unit used to express the amount of magnetic energy stored in a magnet per unit volume. This unit helps assess the magnetic potential of magnets in complex magnetic circuits.
A monopole refers to a theoretical concept explored in physics, particularly particle physics. In reality, magnetic poles always occur in pairs, but monopoles are theorized in certain models.
Litera: N
N rating refers to a numerical designation, e.g., N35, N42, or N52, indicating the maximum energy product (BHmax). These ratings assist users in selecting appropriate magnets for specific applications.
The north pole is one of the two fundamental magnetic poles of a magnet. associated with the direction of outgoing magnetic field lines.
Litera: O
Oersted is named after Hans Christian Oersted, who discovered the relationship between electric currents and magnetic fields. mainly used in the CGS system.
An open circuit refers to a condition where a magnetic circuit is not closed or complete. open circuits may occur due to air gaps or insufficient magnetic materials.
Orientation refers to the alignment or positioning of a magnet, magnetic material, or magnetic component relative to a reference axis. Proper orientation is critical to achieving desired magnetic properties and optimizing magnetic systems.
Litera: P
Paramagnetic materials are substances that exhibit paramagnetism and are weakly attracted to magnetic fields. The magnetism of these materials vanishes when the external field is removed, distinguishing them from ferromagnetic materials.
Paramagnetism is occurs when materials develop a temporary magnetic moment in the direction of the field. examples include aluminum, platinum, and oxygen.
A permanent magnet is a material or object that retains its magnetic properties indefinitely. used in electric motors, generators, magnetic storage devices, and speakers.
They are made from materials with high magnetic retention. Their durability and stability make them indispensable in many industrial applications.
a characteristic that allows a material to support the formation of a magnetic field. High permeability enables efficient transmission of magnetic flux, critical for designing magnetic circuits.
Permeance, denoted by the symbol P, describes the ease with which magnetic flux can flow through a specific magnetic circuit.
The mathematical formula for permeance is expressed as:
P = (μ × A) / l
Where:
μ: Magnetic permeability of the material (H/m)
A: Cross-sectional area of the magnetic path (m²)
l: Length of the magnetic path (m)
For a material with μ = 4π × 10⁻⁷ H/m, A = 0.01 m², and l = 0.1 m, permeance is 1.26 × 10⁻⁵ H.
High permeability is crucial for enhancing the efficiency of magnetic systems.
The mathematical formula for permeance is expressed as:
P = (μ × A) / l
Where:
μ: Magnetic permeability of the material (H/m)
A: Cross-sectional area of the magnetic path (m²)
l: Length of the magnetic path (m)
For a material with μ = 4π × 10⁻⁷ H/m, A = 0.01 m², and l = 0.1 m, permeance is 1.26 × 10⁻⁵ H.
High permeability is crucial for enhancing the efficiency of magnetic systems.
The permeance coefficient is the ratio of remanence (Br) to coercive force (Hd) in a magnetic material. This coefficient impacts magnetic stability and parameters such as the energy product (BHmax) in magnetic circuits.
Plating or coating refers to the process of applying a protective layer to the surface of neodymium magnets. Common coating materials include nickel, copper, epoxy, zinc, gold, and tin.
Polarity describes the orientation of the magnetic field in a neodymium magnet, which has two poles: north and south. plays a significant role in the design of magnet-based devices.
A magnetic pole refers to one of the two ends of a magnet where the magnetic field is strongest: north or south. Their location and properties are critical for optimizing performance in magnetic applications.
Pull force, also known as holding force, describes a magnet's ability to maintain attachment. It can be estimated using the formula:
F = B² × A / (2 × μ₀), where:
F - Pull force (in newtons, N).
B - Magnetic flux density at the magnet's surface (in teslas, T).
A - Contact area of the magnet with the material (in m²).
μ₀ - Permeability of free space (4π × 10⁻⁷ H/m).
Example: If the magnetic flux density is 1.2 T, and the magnet's contact area is 0.005 m², the pull force is:
F = (1.2)² × 0.005 / (2 × 4π × 10⁻⁷) ≈ 572 N.
F = B² × A / (2 × μ₀), where:
F - Pull force (in newtons, N).
B - Magnetic flux density at the magnet's surface (in teslas, T).
A - Contact area of the magnet with the material (in m²).
μ₀ - Permeability of free space (4π × 10⁻⁷ H/m).
Example: If the magnetic flux density is 1.2 T, and the magnet's contact area is 0.005 m², the pull force is:
F = (1.2)² × 0.005 / (2 × 4π × 10⁻⁷) ≈ 572 N.
Litera: R
Rare earth metals are a group of chemical elements, such as neodymium, which are key components of neodymium magnets. Due to their high magnetic strength, they are used in industries, electronics, and consumer technologies.
Rare earth magnets, such as neodymium, are known for their exceptional magnetic strength. These magnets are used in industries, medicine, and electronics where strong magnetic fields are required.
Relative permeability is a measure of how easily a material can be magnetized compared to a vacuum. Neodymium magnets exhibit high relative permeability, enabling efficient design of magnetic circuits.
Reluctance is a measure of the opposition a magnetic circuit presents to the flow of magnetic flux. The design and geometry of the magnet and surrounding materials affect reluctance and the efficiency of magnetic circuits.
Reluctance, denoted by the symbol R, measures a magnetic circuit's opposition to magnetic flux.
The mathematical formula for reluctance is:
R = l / (μ × A)
Where:
R: Magnetic resistance (1/H)
l: Length of the magnetic path (m)
μ: Magnetic permeability of the material (H/m)
A: Cross-sectional area of the magnetic path (m²)
For example, with l = 0.2 m, μ = 4π × 10⁻⁷ H/m, and A = 0.01 m², the reluctance is approximately 1.59 × 10⁶ 1/H.
Reluctance is analogous to electrical resistance in DC circuits, making it a key parameter in designing magnetic circuits.
The mathematical formula for reluctance is:
R = l / (μ × A)
Where:
R: Magnetic resistance (1/H)
l: Length of the magnetic path (m)
μ: Magnetic permeability of the material (H/m)
A: Cross-sectional area of the magnetic path (m²)
For example, with l = 0.2 m, μ = 4π × 10⁻⁷ H/m, and A = 0.01 m², the reluctance is approximately 1.59 × 10⁶ 1/H.
Reluctance is analogous to electrical resistance in DC circuits, making it a key parameter in designing magnetic circuits.
Remanence, often denoted as Bd, is a measure of the residual magnetism remaining in a neodymium magnet after it has been saturated and the external magnetic field is removed. It is a key parameter in evaluating the strength and performance of the magnet.
Repelling refers to the phenomenon where like poles of neodymium magnets (e.g., north to north) exert a force that pushes them apart. Is important in designing systems where avoiding contact between magnets is necessary.
Includes the use of ferromagnetic materials or magnetic conductors to guide the magnetic field. By designing an effective return path, system efficiency can be maximized, and magnetic losses minimized.
Litera: S
Shearing force, denoted by the symbol Fs, refers to the force required to shift a magnet along the contact surface in a direction parallel to the contact plane.
Shear force can be calculated using the formula:
Fs = F × tan(θ)
Where:
F: Pull force (N)
θ: Angle of the contact surface (rad)
For example, if F = 50 N and the angle θ = 30°, the shear force is approximately 28.9 N.
This parameter plays a key role in applications such as magnetic mounts or sliding mechanisms.
Shear force can be calculated using the formula:
Fs = F × tan(θ)
Where:
F: Pull force (N)
θ: Angle of the contact surface (rad)
For example, if F = 50 N and the angle θ = 30°, the shear force is approximately 28.9 N.
This parameter plays a key role in applications such as magnetic mounts or sliding mechanisms.
The south pole is one of the two fundamental magnetic poles of a magnet. The south pole of a magnet attracts the north pole of another magnet, demonstrating magnetic attraction.
This process involves arranging magnets in series or parallel configurations, enhancing the magnetic field. Such arrangements enable stronger magnetic interactions and improved performance in various applications, such as magnetic separators, holders, or sensors.
Litera: T
Neodymium magnets can produce high levels of magnetic field strength, measured in teslas (T) or subunits like milliteslas (mT). The unit is named after Nikola Tesla, a renowned inventor and physicist whose work revolutionized electromagnetism.
Anisotropic magnets have a specific direction of magnetization, ensuring higher efficiency compared to isotropic magnets. Isotropic magnets are ideal for general applications due to their flexibility.
Litera: W
Named after Wilhelm Eduard Weber, a German physicist and pioneer of electromagnetic theory. Useful in analyzing magnet effectiveness in applications like generators, motors, and energy storage systems.
The weight of a neodymium magnet is a critical factor influencing its applications. It can be simply determined based on its density and volume using the formula:
m = ρ × V, where:
m - mass of the magnet (in grams or kilograms).
ρ - density of the magnet (typically 7.5 g/cm³).
V - volume of the magnet (in cm³ or m³).
Example: A magnet with a density of 7.5 g/cm³ and a volume of 10 cm³, the weight is:
m = 7.5 × 10 = 75 g.
Knowing the weight is crucial in projects where balance between mass and magnetic force is important.
m = ρ × V, where:
m - mass of the magnet (in grams or kilograms).
ρ - density of the magnet (typically 7.5 g/cm³).
V - volume of the magnet (in cm³ or m³).
Example: A magnet with a density of 7.5 g/cm³ and a volume of 10 cm³, the weight is:
m = 7.5 × 10 = 75 g.
Knowing the weight is crucial in projects where balance between mass and magnetic force is important.