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Class 12 Mcq

Class 12 Physics के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

PhysicsWhy is the electric field just outside a conductor surface perpendicular to the surface?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsIf the charge in a cavity is positive and the conductor is earthed which statement about charge on the outer surface is correct?Class 12Electric Charges and FieldsConductors and InsulatorsHard PhysicsWhy would electrostatic equilibrium be impossible if potential difference remains inside a conductor?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsWhy does charge produced by rubbing on an insulator not immediately spread over the whole surface like it does on a conductor?Class 12Electric Charges and FieldsConductors and InsulatorsEasy PhysicsA conductor has a cavity and a charge is placed in the cavity. What is required for the field inside the conducting material to remain zero?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsWhy is the tip of a lightning protection rod often made pointed?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsWhen polarisation occurs in an insulator, why is attraction usually observed rather than repulsion?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsIf surface charge density is zero at a point on a charged conductor, what can be said about the normal electric field just outside that point?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsIf charge is localized on an insulator, why can it be difficult to discharge it completely by earthing as one would a conductor?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsThe deepest electrical difference between a conductor and an insulator is based on what?Class 12Electric Charges and FieldsConductors and InsulatorsEasy PhysicsHow is the absence of the effect of an external charge inside a conductor cavity best understood?Class 12Electric Charges and FieldsConductors and InsulatorsHard PhysicsFor which state is the rule that excess charge resides on the surface and not inside a conductor true?Class 12Electrostatic Potential and CapacitanceElectrostatics of ConductorsMedium PhysicsWhy is a closed conductor more useful for electrostatic shielding?Class 12Electric Charges and FieldsConductors and InsulatorsHard PhysicsA conductor is charged and isolated. In electrostatic equilibrium, what is the combined reason for zero internal field and surface charge?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsIf charge is localized on an insulator, how can the electric field distribution be?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsIf a conductor is near an external charge but is not earthed, what does not change due to induction?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsIf charge distribution changes on the outer surface of a conductor, which factor can be important?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsEven though charge exists on a conductor surface why is volume charge density inside conducting material considered zero?Class 12Electric Charges and FieldsElectric Charges and their ConservationMedium PhysicsA charge is placed outside a conductor and the conductor is earthed. The direction of charge flow depends on what?Class 12Electric Charges and FieldsConductors and InsulatorsMedium PhysicsWhat basic error is made if an insulator is treated like an equipotential conductor?Class 12Electric Charges and FieldsConductors and InsulatorsMedium