What is the Origin of the Electric Field in F-N-L's Law?

[Ryuzaky]

Good evening. Can anyone explain me the origin of the electric field in the F-N-L's law ?
I'm referring to this one :

\int_l \vec E^* d\vec l =-\int_s \frac{\partial \vec B}{\partial t} d\vec S

where \vec E^* is defined as (i'm reporting the words of the book) :
\vec E - \vec v \times \vec B.

in particular what is \vec E and what is its origin.

//I apologize for any syntax/grammar error, I have to improve my English, I'm Italian.

 

[hexatrien]

It's the intensity of the electric field.


E=\frac{F}{q},
where F is the force, which the field acts on the electric charge


Intensity of the electric field is used to characterize the electric field.

 

[Ryuzaky]

But that is the electrostatic field and its circuitation is 0 !

 

[cragar]

do you want to know where the E field comes from in faradays law or how E is related to B in that equation.