An electric dipole with dipole moment $4 \times 10^{-9} \text{ Cm}$ is aligned at $60^{\circ}$ with the direction of a uniform electric field of magnitude $5 \times 10^4 \text{ NC}^{-1}$. Calculate the magnitude of the torque acting on the dipole.
- A$17.3 \times 10^{-6} \text{ Nm}$
- B$1.73 \times 10^{-4} \text{ Nm}$
- C$1.73 \times 10^{-6} \text{ Nm}$
- D$17.3 \times 10^{-4} \text{ Nm}$
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