The name is absent

Electromagnetic induction

Analogously to defining the flux Φ_D of the vector of the electric induction D we
can define the flux Φ_B of the vector of the magnetic induction B :

(33)

^φ b = ∫∫ Bds

(s)

It is useful to know that the change in the magnetic flux generates inducted
voltage V_Φ according to the Lenz’s law:

(34)

(35)

V =_- dΦB

^φ dt

^{— —} ^-π     d Φ B

φ E ∙ dl = -B
[           dt

Thus the Lenz’s law shows that there will be induced current if there is a static

cable inside changing magnetic field:

(36)

——

VΦ=-∫∫>d

∂t

(s) ^∂t

or if the cable is moving inside a static magnetic field:

(37)

— —

Vφ = -F × B] ∙ l