of the torque exerted on this dipole if the molecule is subjected to an external electric field of 4.0× 106 N C-', when the angle between the field direction and the axis of the molecule is 45°. (b) Three charges (Q, q, and q) are placed at three corners of a square (side length a) as shown. i. Find the magnitude and direction of the electric field at the vacant corner P. \text { ii. Show that the field at } P \text { is zero if } Q=-2 \sqrt{2} q \text {. }
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