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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।

PhysicsAt a far point on the axial line of a dipole, how is the field compared with a point at the same distance on the equatorial line?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsIn a dipole field line diagram, lines go from positive to negative, but dipole moment is from negative to positive. Why is this not a contradiction?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Medium PhysicsA polar molecule is placed in a non-uniform electric field. Why can it experience both rotation and attraction?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Medium PhysicsDipole moment is doubled and electric field is halved. At the same angle, how will the torque change?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 19Medium PhysicsBoth dipole moment and electric field of a dipole system are doubled while angle remains same. What happens to the torque?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 19Medium PhysicsA dipole is placed in an electric field such that its dipole moment is opposite to the field. If released after a slight disturbance, toward which position will it rotate?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 19Hard PhysicsNet charge inside a closed surface is zero, yet electric field is non-zero at some points on the surface. How is this possible?Class 12Chapter1: Electric Charges and FieldsContinuous Charge DistributionLevel 19Hard PhysicsFlux through an open surface is zero. Does it definitely prove that electric field is zero?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsIf total flux through a closed surface enclosing a complete dipole is zero, is flux through every small part of the surface also zero?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsPoint charge field decreases with square of distance, while far dipole field decreases with cube of distance. What is the main reason?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsWhich statement is correct about distance dependence of the dipole field at far axial and equatorial points?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsWhy is the field at a far point on the equatorial line of a dipole opposite to the dipole moment?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsWhich statement is correct about field direction and dipole moment direction at a far point on the axial line of a dipole?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsA dipole is observed to be pulled toward a region of stronger field. This can indicate what kind of field?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsNet force on a dipole is zero in a uniform electric field. If the field becomes non-uniform, why need the net force not remain zero?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 19Hard PhysicsDipole moment is exactly opposite to the electric field. Why does a slight displacement prove the position unstable?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 19Hard PhysicsDipole moment makes 60 degrees with the field. If the angle is changed to 30 degrees while other quantities remain same, how does torque change?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 19Medium PhysicsIn a uniform electric field, net force on a dipole is zero. When will its torque be maximum?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 19Hard PhysicsA dipole has zero net charge. Still why is its field at a far point small but not necessarily zero?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsA dipole moment has to be made four times while separation is made half. What should be done to the charge magnitude?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Medium