Physics
Conductors and Insulators
Practice questions
Why does charge not immediately spread throughout dry plastic when it is touched?Why do charges on the surface of a conductor rearrange themselves?In electrostatic equilibrium, what is the tangential component of the electric field at the surface of a conductor?Why do dry, undamaged rubber gloves rated for the appropriate voltage provide safety during electrical work?If a material has many free electrons, what will it generally be?If charge carriers are strongly bound to atoms in a material, how will the material generally behave?What causes the directed (drift) motion of free charges in a conductor?In electrostatic equilibrium, what would happen if the electric field inside a conductor were not zero?The study of conductors and insulators helps us understand which behaviour of electric charges in materials?When an isolated metal plate is given charge and reaches electrostatic equilibrium, where is the excess charge mainly found?A dry plastic strip is charged by rubbing. Why does the charge not quickly spread over the whole strip?Why is the electric field inside a conductor zero in electrostatic equilibrium?In which material can electric charge spread easily throughout the object when charge is supplied to it?How do dry, undamaged rubber shoes help in electrical safety?When a charged rod is brought near a metal sphere without touching it, why do charges redistribute in the sphere?Why is the potential the same at all points inside a conductor in electrostatic equilibrium?Under ordinary conditions, in which type of material does electric current flow with great difficulty because there are very few free charge carriers?If an electric field exists inside a conductor, what will happen to its free charges?Why is plastic often used in handles of electrical devices?If a hollow conductor is in electrostatic equilibrium and no charge is present inside its cavity, what is the electric field inside the cavity?