Pirmoji lygtis duota tokia:
div D → = ρ ε ε 0 {\displaystyle \operatorname {div} {\vec {D}}={\frac {\rho }{\varepsilon \varepsilon _{0}}}}
Bet turetu buti
div E → = ρ ε ε 0 {\displaystyle \operatorname {div} {\vec {E}}={\frac {\rho }{\varepsilon \varepsilon _{0}}}}
arba
div D → = ρ {\displaystyle \operatorname {div} {\vec {D}}={\rho }}
it t.t.
