Due to easy measurements, flux meters are used in performing inspections and quality control tasks.Flux meter is also useful for iron testing where its property of independence on the time taken to change in flux is used.Flux meters are also used as ferromagnetic detectors.These can be used in voltage integration circuits.Flux meters are used for plotting of hysteresis loop.These are used for measurements of magnetic fields.Some of the applications of flux meter are as follows: The only disadvantage of flux meter is that these are less sensitive compared to other methods used for calculating flux values. Digital flux meters can directly give information about magnetic characteristics independent of the magnetic size of the magnet under test.Flux meter gives information about the overall degree of magnetization of the material.The unit of magnetic flux density is Weber/m2.it is also called tesla. Where 'B' is the magnetic flux density, () is the magnetic flux and 'A' is the area. The ability of the flux meter to integrate flux over a wide area makes them useful for characterizing magnets. Magnetic flux per unit area is called magnetic flux density.The deflection of the pointer depends only on the integrated flux value and does not show or depends on the time taken by the flux to change.Flexmeter’s scale is calibrated in Weber units, so it is easy to take readings as no unit conversion is required.
This is a portable instrument that can be carried anywhere easily.Some of the advantages of flux meter are as follows: This device requires very low controlling torque and has heavy electromagnetic damping.Īdvantages and Disadvantages of Flux meter Flux meters are an advanced form of the ballistic galvanometer. There have been considerable improvements in its design and today there are also digital flux meters available in the market. This device is in use since the 19th century to measure the magnetic properties of the earth’s magnetic field. What is a Fluxmeter?įluxmeter is the device used to measure the magnetic flux of a permanent magnet. This article discusses an overview of the flux meter and its working. The change in the voltage level of measuring coils is used to calculate the amount of magnetic flux generated by the permanent magnet. Fluxmeter consists of measuring coils placed between permanent magnets known as Helmholtz coil arrangement. To measure the amount of flux generated from a magnetic surface an instrument called ‘Fluxmeter’ is used. The SI unit of magnetic flux is derived as volt-seconds, also known as Weber and Maxwell as CGS unit. Determine the magnetic flux.In electromagnetism, magnetic flux is defined as the number of magnetic lines of forces observed at the surface of a magnetic material. Φ B = BAcos θ = 8.9 x π(5 x 10 -2) 2 x cos 0Įxample 2: The dimensions of a square loop is 0.40m x 0.40m. Radius is given by, r = 5 cm = 5 × 10 -5 m,Īs the magnetic field is perpendicular to the disc, θ = 0, The magnetic flux is produced when the magnetic dipole gets aligned in the direction of the magnetic field while the electric flux is the penetration of the electric field lines due to. Solved examplesĮxample 1: A magnetic field of 8.9 T passes perpendicular to a disc with a radius of 5 cm. The magnetic flux and electric flux are two different concepts but can be interdependent in electromagnetic fields and remains perpendicular to each other. Magnetic flux starts from the north pole and ends at the south pole.Magnetic flux never intersects with one another.Magnetic flux always forms a closed loop.Φ B = BAcos 90 = 0 Properties of magnetic flux The magnetic flux obtained is minimum when the angle between the magnetic field line and the surface is 90.The magnetic flux obtained is maximum when the angle between the magnetic field line and the surface is 0˚.Φ B = nBA cos θ Conditions for maximum and minimum magnetic flux If a coil with n turns of area A, is placed in a magnetic field of strength B, then magnetic flux is given by, The density of the lines indicates the magnitude of the magnetic field. Θ = Angle between the surface and magnetic field line. continuous lines of force or magnetic flux that emerge from north-seeking magnetic poles and enter south-seeking magnetic poles. The magnetic flux can be described mathematically as,Ī = Area of the surface through which flux passes. The magnetic field flux value could be a vector quantity depending upon the flux. The unit of magnetic flux is either Weber (Wb) or Tesla – meter 2. Magnetic flux is the product of the average magnetic field and the perpendicular area through which it passes. Magnetic flux is represented by Φ B and the unit is Weber (Wb). Magnetic flux refers to the total number of magnetic field lines passing through a given surface.