EMR TESTING

 

EMR Electric Fields

Electric Field may be described as electromagnetic force per unit charge , a component of the electromagnetic field . Electric field is an idea introduced to describe electric forces . All charged objects create an electric field that extends outward into the space that surrounds it. Electric field strength is location dependent, and its magnitude decreases as the distance from a location to the source increases .

 The electric field strength at a point is the force per unit charge exerted on a positive charge placed at that point. An electric field does not deal with the body itself, but the region surrounding it. It describes the alteration of the space in the region surrounding the body and results in an electric force detected by a test charge entering the region. In other words, the charge is the "thing" that causes the field.

 Electric current in wires is the flow of charge, where magnetic field is also generated . Magnetic fields and magnetic forces are more complicated than electric fields and electric forces, changing electric field generates a magnetic field, An electric field is defined as being present in any region where a charged object experiences an electric force. Force on a charged particle due to an electric field is directed parallel to the elector in the case of a positive charge, and antiparallel in the case of a negative charge.

 A charged particle has the ability to interact with other charged particles through what we call the electromagnetic interactions. A charge creates an electric field, and an electric field acts on a charge. An electric field is a vector field. In other words, it is an entity which has a value and a direction at every point in space.

 Biological cells stressed by external electric fields undergo mechanical deformation and remodeling caused by electro-mechanical stresses. These stresses appear at the internal and external membrane interfaces due to differences in dielectric properties of the biological membrane and the surrounding and internal fluids. Electro-mechanical loading of the cells results in the reversible or irreversible development of pores in the membrane. This could cause disruption in normal functioning of the cell and even leads to cell death. Such a phenomenon has several practical applications including pulsed electric field (PEF) processing of fluids. In the PEF process liquids and pumpable products are subjected to short high electric field pulses that lead to non-thermal inactivation of bacteria.