Physics
Conductors and Insulators
Practice questions
Why may charge not divide equally between two unequal conductors in contact?The electric field inside a conductor is zero. Does this prove that there is no charge on the conductor?Why is excess volume charge density inside a conductor considered zero in electrostatic equilibrium?Toward which state do free charges move while a conductor reaches electrostatic equilibrium?If the electric field inside a closed conductor is zero, what can be said about energy associated with the electric field inside?How does a closed metal cage protect the inside from an external electrostatic field?Why does a person inside a car get relative protection during lightning?Why is a lightning protection rod made of metal and connected to earth?What is the physical reason for keeping the tip of a lightning rod sharp?If an insulator has localized charge why may touching one point to earth not discharge the whole object immediately?What microscopic change can occur inside an insulator in an external electric field?A charged comb attracts small pieces of paper. What is the correct advanced reason?In which situation can local positive and negative regions form on a conductor with zero net charge?A conductor has zero field inside but field exists outside. What is the most correct meaning?Which arrangement is best for protecting a sensitive device from external electrostatic effect?Which is the complete identity of electrostatic equilibrium for a conductor?Which statement gives the deeper identity of the electrical behaviour of an insulator?What is the most fundamental physical basis of the difference between a conductor and an insulator?If a material has very few free charge carriers, which electrostatic behaviour is more likely?What broad conclusion follows from an advanced study of conductors and insulators?