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Class 12 · Physics
→When a charged rod is brought near an initially neutral insulator, the insulator is attracted towards the rod but its net charge remains unchanged. What explains this?
Class 12 · Physics
→If a neutral conductor is earthed while a negatively charged rod is kept nearby where can electrons go?
Class 12 · Physics
→A neutral metal conductor is earthed, and a positively charged rod is brought near it without touching it. Which type of charge flows from the earth into the conductor?
Class 12 · Physics
→If surface charge density on a conductor increases which statement about the field just outside the surface is suitable?
Class 12 · Physics
→What is the most suitable reason for the electric field becoming strong near a sharp metal tip?
Class 12 · Physics
→Why is the electric field just outside the surface of a conductor perpendicular to the surface in electrostatic equilibrium?
Class 12 · Physics
→A neutral insulating sphere is placed near a positive point charge. Why does the sphere experience a net attraction without any flow of free charges?
Class 12 · Physics
→Why may charge not divide equally when two conductors of unequal sizes are brought into contact?
Class 12 · Physics
→If one identical metal sphere is charged and another is neutral why does charge divide when they touch?
Class 12 · Physics
→When does the rearrangement of free charges in a conductor stop?
Class 12 · Physics
→Why does a closed metal cage placed in an external electrostatic field shield its empty interior from the electric field?
Class 12 · Physics
→An isolated conductor is initially neutral. A charge \(+q\) is placed inside its cavity without touching the conductor. In electrostatic equilibrium, what is the total charge on the outer surface of the conductor?
Class 12 · Physics
→A conductor is in electrostatic equilibrium in vacuum and has surface charge density \(\sigma\) at a point on its surface. What is the magnitude of the electric field just outside the surface?
Class 12 · Physics
→The condition that a conductor is equipotential is most deeply connected with what?
Class 12 · Physics
→What is the most correct difference between charge separation only and actual charging?
Class 12 · Physics
→In charging by induction, what problem can occur if the external charged object is removed before removing the earth connection?
Class 12 · Physics
→When a neutral, isolated material is placed in an external electrostatic field, what is the main microscopic difference between polarisation in an insulator and electrostatic induction in a conductor?
Class 12 · Physics
→Why is charge density not the same everywhere on an irregular conductor?
Class 12 · Physics
→In electrostatic equilibrium, if a positive point charge \(+q\) is placed inside a closed cavity of a conductor, what is the total induced charge on the inner surface of the cavity?
Class 12 · Physics
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