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Class 12 · Physics
→What change occurs in molecules of an insulator placed in an external electric field?
Class 12 · Physics
→Why may a locally charged insulator not fully discharge instantly when only one point is earthed?
Class 12 · Physics
→The advantage of a pointed lightning rod is most related to which effect?
Class 12 · Physics
→Why is it necessary for a lightning protection rod to be connected to earth?
Class 12 · Physics
→What is the correct scientific basis of protection inside a car during lightning?
Class 12 · Physics
→Why can the effect of an external electrostatic field be reduced on a person inside a metal cage?
Class 12 · Physics
→If the electric field inside a closed conductor is zero, what is the conclusion about electric-field energy inside?
Class 12 · Physics
→When does rearrangement of free charges in a conductor stop?
Class 12 · Physics
→Why is excess volume charge density zero inside a conductor and charge present on the surface in electrostatic equilibrium?
Class 12 · Physics
→The electric field inside a conductor is zero. Which wrong conclusion should not be drawn from this?
Class 12 · Physics
→What is the correct reason charge may not divide equally when two unequal conductors touch?
Class 12 · Physics
→What condition allows charge to divide equally when two identical metal spheres are brought into contact?
Class 12 · Physics
→Why is a metal object kept on an insulating stand to retain static charge for a longer time?
Class 12 · Physics
→Why does a metal rod held by hand fail to retain static charge when rubbed, while a plastic rod can retain it?
Class 12 · Physics
→Treating an insulator as equipotential like a conductor is based on which wrong assumption?
Class 12 · Physics
→If charge is localized on an insulator, what type of electric-field distribution is likely near it?
Class 12 · Physics
→A rubbed insulator does not spread charge over its whole surface. What is the deeper reason?
Class 12 · Physics
→How can induction in a conductor and polarisation in an insulator be distinguished at the microscopic level?
Class 12 · Physics
→Why can attraction occur in an insulator due to polarisation even if its net charge remains zero?
Class 12 · Physics
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