Remanence, measured in Gauss, is described as the magnetism that is left in a magnet, after the removal of the external magnetic force applied to magnetise it.
The remanence value of a magnet is the flux density held by the magnet whilst it is in a closed circuit. When the magnet is removed from the hysteresis graph testing machine, it is no longer in a closed circuit and is considered as open circuit. The magnetism falls instantly to a much lower level and this value depends on the ratio between the surface area and it's relative magnetic length.
The strength of a magnetic field is typically measured using a device called a magnetometer. This device consists of a probe or sensor that can detect the presence and strength of a magnetic field. The most common type of magnetometer is a Hall effect sensor, which measures the strength of a magnetic field by detecting the Hall voltage generated by the movement of charged particles in the presence of a magnetic field.
The strength of a magnetic field is measured in units of tesla (T) or gauss (G). One gauss is equal to 1/10,000 of a tesla. In some cases, the unit of oersted (Oe) may also be used to measure the strength of a magnetic field, particularly in the field of magnetism and magnetization.
Yes, the strength of a magnetic field can be measured at any point in space using a magnetometer. However, the accuracy of the measurement may vary depending on factors such as distance from the source of the magnetic field, interference from other magnetic fields, and the sensitivity of the magnetometer being used.
The strength of a magnetic field can be affected by several factors, including the distance from the source of the field, the size and orientation of the magnetic source, and the presence of other magnetic fields nearby. The type of material the magnetic field is passing through can also affect its strength, as some materials are more permeable to magnetic fields than others.
The strength of a magnetic field can be increased by increasing the number of magnetic field lines per unit area. This can be achieved by increasing the current flowing through a wire, increasing the number of turns in a coil, or using a stronger permanent magnet. Additionally, certain materials, such as iron, can be magnetized to enhance the strength of a magnetic field.