The permissible flux density in case of cold rolled grain oriented steel is around 2.7 Wb/m2.
Grain-oriented electrical steel is a type of electrical steel that has been processed to align the grains of the material in a specific direction. This alignment allows the steel to have a higher permeability, which means that it can be magnetized more easily. Grain-oriented electrical steel is used in a variety of applications, including transformers, motors, and generators.
The permissible flux density is the maximum flux density that can be applied to a material without causing it to saturate. Saturation occurs when the magnetic field becomes so strong that it cannot be increased any further. When a material saturates, its permeability decreases and its resistance to the flow of current increases. This can lead to a number of problems, including decreased efficiency and increased heating.
The permissible flux density for grain-oriented electrical steel is typically around 2.7 Wb/m2. This value may vary depending on the specific grade of steel and the manufacturing process used. It is important to consult the manufacturer’s specifications to determine the permissible flux density for a particular application.
The other options are incorrect because they are not within the range of permissible flux densities for grain-oriented electrical steel.