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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।

PhysicsA dipole is antiparallel to the electric field. If it is slightly rotated, why does it not return?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Hard PhysicsA dipole is parallel to the electric field. If it is slightly rotated, why does it tend to return?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Hard PhysicsNet force on a dipole in a uniform field is zero. Yet why does its energy depend on angle?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Hard PhysicsWhy does a non-polar molecule have no permanent dipole moment without an external field?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsWhy does a polar molecule tend to align when placed in an external uniform electric field?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Medium PhysicsNet charge of an electric dipole is zero. Still why can its dipole moment be non-zero?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsIf charge magnitude of a dipole is halved and separation is made four times, what happens to dipole moment?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsIf the magnitude of charges of a dipole is doubled and their separation is also doubled, what happens to dipole moment?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsAt the centre of a dipole, field lines are directed from positive to negative, but what is the direction of dipole moment?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsWhy is the net field on the equatorial line of a dipole opposite to the dipole moment?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Hard PhysicsFor the same far distance, how is the axial field of a dipole related to the equatorial field?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Hard PhysicsAt a far equatorial point of a dipole, if distance is tripled, what fraction of the field approximately remains?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Hard PhysicsAt a far point on the axial line of a dipole, if distance is doubled, what does the field approximately become?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Hard PhysicsA dipole has zero net charge, yet why can it be pulled in a non-uniform field?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Hard PhysicsA dipole has zero net force in a uniform electric field. If the field is made non-uniform, why can a net force appear?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Hard PhysicsWhy is external work needed to rotate a dipole from parallel to perpendicular orientation in an electric field?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Hard PhysicsDipole moment is antiparallel to the field. Torque is zero at that instant, yet why is it not stable equilibrium?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Hard PhysicsAn electric dipole is placed in a uniform electric field with its dipole moment at 60° to the field. Why is the turning effect nonzero?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Medium PhysicsThe dipole moment becomes three times its original value, the electric field becomes half its original value, and the angle remains unchanged. What is the new torque compared with the original torque?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Medium PhysicsThe dipole moment is doubled and the uniform electric field is tripled. If the angle between them remains unchanged, what happens to the torque on the dipole?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Medium