Electric strength refers to the maximum electric field that a material can withstand before breaking down and allowing electrical current to flow through it.
It is a measure of a material’s ability to resist electrical breakdown or insulation failure under high voltage conditions. Electric strength is typically expressed in units of volts per meter (V/m) or kilovolts per millimeter (kV/mm).
Materials with higher electric strength are better insulators and are often used in applications requiring high voltage resistance, such as electrical cables and insulation materials.