{"knowledge_schema": {"broad_category": "Physics \u2192 Electrostatics \u2192 Electric Fields", "refinement": "This problem involves understanding the behavior of electric fields in the presence of conductors and cavities, particularly focusing on the effects of charge distribution and distance from the charge.", "specific_scope": "The scenario describes a spherical conductor with a cavity containing a charge, and we need to determine the electric field at a point outside the conductor, taking into account the geometry of the system.", "goal": "Calculate the electric field at point P outside the spherical conductor due to the charge placed inside the cavity."}, "summary": "In this problem, we analyze the electric field generated by a positive charge placed inside a cavity of an uncharged spherical conductor. The key points to consider are that the electric field outside the conductor is influenced only by the total charge enclosed, which in this case is zero since the conductor is uncharged. Therefore, the electric field at point P, which is outside the conductor, can be determined using the properties of electric fields and the geometry of the system. The correct expression for the electric field at point P will depend on the distance from the charge and the angle related to the position of the cavity."}