Electric field

Electrocardiography

An electric field is…

a property of the space surrounding an electric charge, which is expressed by a force acting on other electrically charged bodies

The intensity of the electric field

determines the magnitude and direction of the force acting on other electrically charged bodies

The potential of the electric field …

determines the energy stored by the field

the electrical potential at a point of the field is

The work performed by the field to move a unit charge from the point to infinity

The voltage between two points in the field is …

the difference between the potentials of these points

Polarization is

The displacement of charged particles in dielectrics by an external electric current

The polarization in an electric field is generated …

inside the dielectric

pointing in the opposite direction relative to the external field

The net electric field in dielectrics is …

smaller than the external field

Relative permittivity is:

the material specific ratio of the external field to the internal field in dielectrics

An electric dipole is …

a system of two equal point charges of the opposite sign positioned at some distance from each other

Biopotentials are …

the potentials of the electric fields generated by the living organism

Electrocardiogram is …

a graphic recording of the changes occurring in the biopotentials of the heart over time

The electric field intensity is represented by field lines . The field vector at each point is to the field line through the point

is tangential

The electric field intensity is ……… to the ……. of the field lines

is proportional …. to the density