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Magnetic field strength is a measure of the intensity of a magnetic field in a given area of that field. Represented as H, magnetic field strength is typically measured in amperes per meter (A/m), as defined by the International System of Units (SI).
magnetic field strength, also called magnetic intensity or magnetic field intensity, the part of the magnetic field in a material that arises from an external current and is not intrinsic to the material itself. It is expressed as the vector H and is measured in units of amperes per metre. The definition of H is H = B/μ − M, where B is the magnetic flux density, a measure of the actual magnetic field within a material considered as a concentration of magnetic field lines, or flux, per unit cross-sectional area; μ is the magnetic permeability; and M is the magnetization.

The magnetic field H might be thought of as the magnetic field produced by the flow of current in wires and the magnetic field B as the total magnetic field including also the contribution M made by the magnetic properties of the materials in the field. When a current flows in a wire wrapped on a soft-iron cylinder, the magnetizing field H is quite weak, but the actual average magnetic field (B) within the iron may be thousands of times stronger because B is greatly enhanced by the alignment of the iron’s myriad tiny natural atomic magnets in the direction of the field.The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Erik Gregersen.magnetic susceptibilityTable of ContentsIntroductionFast FactsRelated ContentMoreMore Articles On This TopicContributorsArticle HistoryHomeSciencePhysicsMatter & Energymagnetic susceptibilityphysics Written and fact-checked by Last Updated: Article HistoryRelated Topics: ferromagnetism magnetic field paramagnetism diamagnetism molar susceptibilitymagnetic susceptibility, quantitative measure of the extent to which a material may be magnetized in relation to a given applied magnetic field. The magnetic susceptibility of a material, commonly symbolized by χm, is equal to the ratio of the magnetization M within the material to the applied magnetic field strength H, or χm = M/H. This ratio, strictly speaking, is the volume susceptibility, because magnetization essentially involves a certain measure of magnetism (dipole moment) per unit volume.Magnetic materials may be classified as diamagnetic, paramagnetic, or ferromagnetic on the basis of their susceptibilities. Diamagnetic materials, such as bismuth, when placed in an external magnetic field, partly expel the external field from within themselves and, if shaped like a rod, line up at right angles to a nonuniform magnetic field. Diamagnetic materials are characterized by constant, small negative susceptibilities, only slightly affected by changes in temperature.

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Torque or Moment of Force - Online Converter

Torque or moment - the tendency of a force to rotate an object around an axis or a point - is defined asthe product of the force and the distance from the point or axis to the force vectorTorque can be expressed asT = F a (1)whereT = moment - or torque of the force (Nm, lbf ft)F = applied force (N, lbf)a = moment arm (m, ft)Example - Torque exerted by a WrenchA force of 250 N is acting at the end of a 30 cm long wrench. The torque exerted can be calculated asT = (250 N) (30 cm) (0.01 cm/m) = 75 Nm

The Law of Lever is a torque balance on a stationary object and can be expressed asF₁ / F₂ = L₂ / L₁ (2)whereF = force (N, lb_f)L = distance from the point (1 or 2) to the force vector (m, ft)(1) can be transformed toF₁ L₁ = F₂ L₂ (2b)orT₁ = T₂ (2c)Example - LeverA person with a mass of 90 kg is standing on one side of a lever 2 m from the balance point. The force on the other side of lever 0.5 m from the balance point can be calculated by modifying (2) toF₂ = F₁ L₁ / L₂ = (90 kg) (9.81 m/s²) (2 m) / (0.5 m) = 3531 N

Moment of force (also called torque or just moment) is the tendency of a force to twist or rotate an object. A moment is the product of the force and the moment arm. The moment arm is the perpendicular distance from the point of rotation, to the line of action of the force. The moment may be thought of as a measure of the tendency of the force to cause rotation about an imaginary axis through a point.In SI, the moment of force is measured in newton-meter (N·m). One newton meter is equal to the torque resulting from a one-newton force applied perpendicularly to a one-meter long moment arm. In CGS, the moment of force is measured in gram-force centimeter (gf·cm).Using the Moment of Force Converter ConverterThis online unit converter allows quick and accurate conversion between many units of measure, from one system to another. The Unit Conversion page provides a solution for engineers, translators, and for anyone whose activities require working with quantities measured in different units.

You can use this online converter to convert between several hundred units (including metric, British and American) in 76 categories, or several thousand pairs including acceleration, area, electrical, energy, force, length, light, mass, mass flow, density, specific volume, power, pressure, stress, temperature, time, torque, velocity, viscosity, volume and capacity, volume flow, and more.
Note: Integers (numbers without a decimal period or exponent notation) are considered accurate up to 15 digits and the maximum number of digits after the decimal point is 10.In this calculator, E notation is used to represent numbers that are too small or too large. E notation is an alternative format of the scientific notation a · 10^x. For example: 1,103,000 = 1.103 · 10⁶ = 1.103E+6. Here E (from exponent) represents “· 10^”, that is “times ten raised to the power of”. E-notation is commonly used in calculators and by scientists, mathematicians and engineers.In the list on the right, select the unit to convert from.Enter the value (for example, “20”) into the corresponding input box.The results of the conversion will immediately appear in all unit boxes.Find the unit to convert to in the list and read the calculated value.Alternatively, you can enter the value into any right input box, and the results of the conversion will be immediately recalculated.We work hard to ensure that the results presented by TranslatorsCafe.com converters and calculators are correct. However, we do not guarantee that our converters and calculators are free of errors. All of the content is provided “as is”, without warranty of any kind.

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