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Q)

Two equal and opposite charges $ 8 \times 10^{-8} C$ are placed $ 2 \times 10^{-2} $ cm away from a dipole . If this dipole is placed in an external electric field $2 \times 10^8 N/C$. the value of maximum torque and work done in rotating through $180^{\circ}$ will be :

$(A)\;64 \times 10^{-4} Nm \;and\; 64 \times 10^4 J \\ (B)\;32 \times 10^{-4} Nm \;and\; 32 \times 10^{-4} J \\ (C)\;64 \times 10^{-4} Nm \;and\; 32 \times 10^{-4} J \\ (D)\;32 \times 10^{-4} Nm \;and\; 64 \times 10^{-4} J $

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