Question

Find symbols have standard meanings.
(a) electric field E,
(B) magnetic field B and
(c) magnetic permeability ${\eta }_0$ The relevant equation are

Answer 1

Parameter name: electrical field

Symbol: $E$

Formula: $E=F/q\left(Volt/meter\right)$

Definition: Region around an electric charge, $q$, in which an electric force, $F$, is exerted on another charge.

Parameter name: Magnetic field

Symbol: $B$

Formula: $B=\frac{{\mu }_{0}I}{2\pi r}$ (Tesla)

Definition: Field produced by either a magnet or by current flows

Parameter name: Permeability of Free Space:

Symbol: ${\eta }_o$

Formula: $\mu =B/H=\frac{magneicfluxdensity}{magneticfieldstrength}$

Definition: magnetic permeability associated with a vacuum, i.e. the permeability of a magnetic field in the absence of any material.