The magnitude of the charge of an electric dipole is $3.2 \times 10^{-19} \ C$ and the distance between them is $2.4 \ \mathring{A}$. If it is placed in an electric field of $4 \times 10^5 \ V/m$,then its dipole moment (in $C-m$) is .......

  • A
    $9.6 \times 10^{-5}$
  • B
    $12.8 \times 10^{-14}$
  • C
    $7.68 \times 10^{-29}$
  • D
    $30.72 \times 10^{-24}$

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