Physics
Conductors and Insulators
Practice questions
A material in which electric charges can move easily is called what?An object in which charge cannot move easily is called what?Which of the following materials is generally a good conductor of electricity?Which of the following materials is generally an electrical insulator?Why is a metal generally a good conductor when an electric field is applied to it?Why does electric charge not flow easily through insulating materials?In electrostatic equilibrium, where does the excess charge on an isolated conductor lie if there is no charge inside any cavity of the conductor?In electrostatic equilibrium, where does the excess charge given to an isolated conductor reside?What is the main basis of difference between conductors and insulators?When rubbed with dry hair, a plastic comb can acquire and retain static charge because plastic is generally what type of material?In which material do free electrons move most easily?Dry wood generally behaves as which type of material?Which of the following materials is a good conductor of electricity?In earthing, the earth acts as what?Why is there no net directed motion of free charges inside a conductor in electrostatic equilibrium?Why does charge placed on an insulator generally not spread easily throughout it?When a metal sphere is charged, where does the excess charge spread in electrostatic equilibrium?Why are electric wires covered with a layer of plastic?Which of the following objects uses an electrical conductor?Which example uses an insulator for electrical safety?