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Class 12 · Physics · Hard
→A charged comb attracts small pieces of paper. What is the correct advanced reason?
Class 12 · Physics · Hard
→What microscopic change can occur inside an insulator in an external electric field?
Class 12 · Physics · Medium
→If an insulator has localized charge, why may touching one point to earth not discharge the whole object immediately?
Class 12 · Physics · Hard
→What is the main physical reason for keeping the tip of a lightning rod sharp?
Class 12 · Physics · Medium
→Why is a lightning protection rod made of metal and connected to earth?
Class 12 · Physics · Medium
→A person inside a car gets relative protection during lightning due to which principle?
Class 12 · Physics · Medium
→Why does a closed metal cage protect from an external electrostatic field?
Class 12 · Physics · Medium
→The electric field inside a closed conductor is zero. Which statement about energy associated with the electric field is correct?
Class 12 · Physics · Medium
→Toward which state do free charges move while a conductor reaches electrostatic equilibrium?
Class 12 · Physics · Medium
→If volume charge density inside a conductor is zero in electrostatic equilibrium, where will excess charge be?
Class 12 · Physics · Medium
→The electric field inside a conductor is zero. Does this prove that there is no charge on the conductor?
Class 12 · Physics · Hard
→Why may charge not divide equally between two unequal conductors in contact?
Class 12 · Physics · Medium
→Why can final charge become equal when two identical metal spheres are brought into contact?
Class 12 · Physics · Easy
→In which condition can static charge remain on a metal object for a longer time?
Class 12 · Physics · Medium
→Why is it difficult to retain static charge on a metal object held by hand?
Class 12 · Physics · Medium
→Why is it wrong to treat an insulator as equipotential like a conductor?
Class 12 · Physics · Medium
→If charge is localized on an insulator, how can the electric field around it be?
Class 12 · Physics · Medium
→Why does charge produced by rubbing on an insulator not spread uniformly over the whole surface?
Class 12 · Physics · Medium
→Which is the most correct comparison between induction in a conductor and polarisation in an insulator?
Class 12 · Physics · Medium
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