Reciprocal - 3, E and H (very simple field theory)

E (Electric Field Strength) and H (Magnetic Field Strength) . H may be difficult to catch for some people.


1. Equations


                                            V (voltage)
E (Electric Field Strength) =  ----------------
                                            d (distance)

                    V(oltage)
The unit is   ------------
                    m(eter)


V can be either constant or variable (in this case usually the small <v> is used.)

                                               I (current)
H (Magnetic Field Strength)  = ------------------
                                               d (distance)

                    A(mpere)
The unit is   -------------
                    m(eter)

I can be either constant or variable (in this case usually the small <i> is used)


    A
  -----  is abstract or abstracted. Difficult to imagine. 
    m

                                                                           tQ

I (current) is time derivative of Q (Charge) =  -----
                                                                           dt

and Q (charges) is supposed to move in this case, not static as V and creates magnetic field.

2. Field Concept


         V
E =  -----
         d

When V is constant

E changes almost infinite (∞) to almost zero (0) as d changes almost zero (0) to almost infinite (∞). Reciprocal relation. The point is that E exists at every point (every where) in space.


          I
H  = -----
         d

 When H is constant

H changes almost infinite (∞) to almost zero (0) as d changes almost zero (0) to almost infinite (∞). Again reciprocal relation. The point is that H exists at every point (every where) in space.


Every where then Field Theory.


ACT