Physics
Conductors and Insulators
Practice questions
Why does a plastic comb attract small, neutral pieces of paper after being rubbed?In electrostatic equilibrium, if a closed cavity inside a conductor contains no charge, what will be the electric field inside the cavity due to an external electrostatic field?In electrostatic equilibrium, where does excess charge given to an isolated conductor reside?Which process enables an insulator to show an electric response in an external electric field without carrying a sustained electric current?A neutral conductor is brought near a negatively charged object without touching it. The conductor is earthed, and then the earth connection is removed while the negatively charged object remains nearby. What will be the final state of the conductor?When an insulator is charged by rubbing, why does the transferred charge not quickly spread throughout the material?What best explains the difference in charge distribution between conductors and insulators?In electrostatic equilibrium, what is the value of the electric field within the material of a conductor?Studying conductors and insulators clarifies which main idea in electrostatics?A closed hollow conductor is in electrostatic equilibrium, and no charge is present inside its cavity. Due to a stationary charge placed outside the conductor, what will be the electric field inside the cavity?If a tangential component of electric field exists at the surface of a conductor, which statement about the free charges is correct?When an isolated metal sphere is given a positive charge, where does its excess charge reside in electrostatic equilibrium?When an insulator is polarised, if no charge is transferred to or from it, what is true about its net charge?An isolated neutral conductor is placed near a negatively charged rod. What induced charge appears at the end of the conductor farther from the rod?An isolated neutral conductor is placed near a positively charged rod. Which charge is induced at the end of the conductor farther from the rod?In electrostatic equilibrium, what is the potential difference between any two points inside a conductor?Which phenomenon becomes more likely due to higher charge density at a sharp metal tip?An isolated metal sphere initially has a potential different from that of Earth. When it is connected to Earth, what will be the potential of the sphere in electrostatic equilibrium?If charges separate in a neutral conductor only by induction and there is no earthing, what will be the net charge?Why does a metal rod not remain charged for long when it is rubbed while being held in the hand?