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Surface Charged Density can be expressed as ฯ = Q/A, where Q is the charge and A is the area. The surface charge density is uniform, so ฯ = Q/A = 4.69 g/cmยฒ. The electric field at a point P is given by E = kQ/rยฒ, where k is the electrostatic constant, Q is the charge, and r is the distance from the charge. The electric field at point P is E = (4ฯฮตโQ)/(rยฒ), where ฮตโ is the permittivity of free space. The electric field at point P is E = (8kQ)/(rยฒ). The potential difference between two points A and B is given by V = -โซEยทdr, where E is the electric field and dr is the displacement vector. The potential difference between points A and B is V = -โซ(8kQ)/(rยฒ)ยทdr. The work done in moving a charge Q from point A to point B is given by W = QโV, where โV is the change in potential difference. The work done in moving a charge Q from point A to point B is W = Q(VB - VA). The correct answer is ~8kV/m.
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