Physics
Conductors and Insulators
Practice questions
Why can final charge become equal when two identical metal spheres are brought into contact?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?If volume charge density inside a conductor is zero in electrostatic equilibrium, where will excess charge be?Toward which state do free charges move while a conductor reaches electrostatic equilibrium?The electric field inside a closed conductor is zero. Which statement about energy associated with the electric field is correct?Why does a closed metal cage protect from an external electrostatic field?A person inside a car gets relative protection during lightning due to which principle?Why is a lightning protection rod made of metal and connected to earth?What is the main 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?If a conductor has zero net charge but local positive and negative regions on its surface, how should this be understood?If a conductor has zero field inside but field exists outside, which statement is most correct?In which situation will a sensitive device inside a conductor be most protected from external electrostatic effect?Which is the complete identity of electrostatic equilibrium for a conductor?Which gives a deeper identity of electrical behaviour of an insulator?What is the most fundamental physical basis of the difference between conductor and insulator?If a material has very few free charge carriers, what behaviour is more likely in electrostatics?