Electric field measurement involves determining the strength and direction of an electric field in a given area. This is typically done using instruments like electrometers or field meters, which can detect the presence of electric charges and measure the voltage difference between points in the field. The unit of measurement for electric fields is volts per meter (V/m). Electric fields are crucial in various applications, including telecommunications, medical devices, and research in physics, as they help scientists and engineers understand how electric forces interact with charged particles and influence their behavior.