An electric dipole is placed at an angle of $30^\circ$ with an electric field intensity of $2 \times 10^5 \, \text{NC}^{-1}$. It experiences a torque equal to $4 \, \text{Nm}$. The charge on the dipole,if the dipole length is $2 \, \text{cm}$,is:

  • A
    $5 \, \text{mC}$
  • B
    $7 \, \mu\text{C}$
  • C
    $8 \, \text{mC}$
  • D
    $2 \, \text{mC}$

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