A. $q_1=3.{10}^{-9}\left(C\right), q_2=2.{10}^{-9}\left(C\right)$ hoặc $q_1=-2.{10}^{-9}\left(C\right), q_2=-3.{10}^{-9}\left(C\right)$

B.  $q_1=3.{10}^{-9}\left(C\right), q_2=-2.{10}^{-9}\left(C\right)$ hoặc  $q_1=-2.{10}^{-9}\left(C\right), q_2=3.{10}^{-9}\left(C\right)$

C.  $q_1=2.{10}^{-9}\left(C\right), q_2=-{10}^{-9}\left(C\right)$ hoặc  $q_1=-2.{10}^{-9}\left(C\right), q_2={10}^{-9}\left(C\right)$

D.  $q_1=2.{10}^{-9}\left(C\right), q_2={10}^{-9}\left(C\right)$ hoặc  $q_1=-2.{10}^{-9}\left(C\right), q_2=-{10}^{-9}\left(C\right)$

A. $q_1=8.{10}^{-8}\left(C\right), q_2=2.{10}^{-8}\left(C\right)$

$\mathit{B}\mathbf{.} q_1=-2.{10}^{-8}\left(C\right), q_2=-8.{10}^{-8}\left(C\right)$

  $\mathit{C}\mathbf{.} q_1=8.{10}^{-8}\left(C\right), q_2=2.{10}^{-8}\left(C\right)$ hoặc  $q_1=-2.{10}^{-8}\left(C\right), q_2=-8.{10}^{-8}\left(C\right)$

$\mathit{D}\mathbf{.} q_1=8.{10}^{-8}\left(C\right), q_2=-2.{10}^{-8}\left(C\right)$ hoặc $q_1=-2.{10}^{-8}\left(C\right), q_2=8.{10}^{-8}\left(C\right)$

A. $q_1=2.{10}^{-8 }C và q_2= -2.{10}^{-8}C.$

B. $q_1=4.{10}^{-8 }C và q_2= -4.{10}^{-8}C.$

C. $q_1=-2.{10}^{-8 }C và q_2=8.{10}^{-8}C.$

D. $q_1=2.{10}^{-8 }C và q_2=2.{10}^{-8}C.$

A.  $2.{10}^4 V/m$

B. $3.{10}^4 V/m$

C. $4.{10}^4 V/m$

D. $5.{10}^4 V/m$

A.  ${\mathrm{q}}_1={\mathrm{q}}_2=2,67.{10}^{-9}$ (μC).

B.  ${\mathrm{q}}_1={\mathrm{q}}_2=2,67.{10}^{-7}$ (μC).

C.  ${\mathrm{q}}_1={\mathrm{q}}_2=2,67.{10}^{-9}$ (C).

D.  ${\mathrm{q}}_1={\mathrm{q}}_2=2,67.{10}^{-7}$ (C).

A. r = 18cm

B. r = 9cm

C. r = 27cm

D. r = 12cm