Physics
Conductors and Insulators
Practice questions
What broad conclusion comes from advanced study of conductors and insulators?An isolated irregular conductor is in electrostatic equilibrium. Why must the electric field at any point inside it be zero?If there is potential difference between two internal points of a conductor which conclusion is most appropriate?What is the deeper reason that excess charge is not found inside a charged conductor?A positive charge is placed inside the cavity of a neutral conductor. What is the total induced charge on the inner surface?A negative charge is placed inside the cavity of a neutral conductor. What will be the total charge on the outer surface?If a positive charge is in a cavity and the conductor is earthed, which statement about the total charge on the outer surface is correct?Why can the parallel component of electric field not remain on a conductor surface in static condition?What is the direction of the electric field just outside the surface of a conductor?The local value of electric field near a conductor surface is most closely related to what?What is the basic reason for the stronger electric field near a sharp conducting tip?Why is electric discharge more likely at a sharp metal tip?Why does charge spread uniformly on an isolated spherical conductor?Why can surface charge distribution change when an external charge is brought near a spherical conductor?What happens at the near and far ends when a positively charged rod is brought near a neutral conductor?What effect appears at the near end when a negatively charged rod is brought near a neutral conductor?If a charged object is only brought near a conductor and the conductor is neither touched nor earthed, what happens to its net charge?What is the main role of earthing in actual charging by induction?In an earthed conductor near a positively charged rod, in which direction can electrons move?In an earthed conductor near a negatively charged rod, in which direction can electrons move?