Two charges each of magnitude 0.01 C and separated by a distance of 0.4 mm constitute an electric dipole. If the dipole is placed in an uniform electric field E→ of 10 dyne/C making 30° angle with E→, the magnitude of torque acting on dipole is:

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Two charges each of magnitude 0.01 C and separated by a distance of 0.4 mm constitute an electric dipole. If the dipole is placed in an uniform electric field $\vec{E}$ of 10 dyne/C making 30° angle with $\vec{E}$ , the magnitude of torque acting on dipole is:

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$4.0 \times 10^{- 10} Nm$

$2.0 \times 10^{- 10} Nm$

$1.0 \times 10^{- 8} Nm$

$1.5 \times 10^{- 9} Nm$

answer is C.

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