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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, if the distance is doubled, what fraction of the field approximately remains?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Hard PhysicsA dipole has zero net charge, yet why can it experience a pull 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. Why can a net force arise in a non-uniform field?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. Even though torque is zero at that instant, why is the position unstable?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Hard PhysicsDipole moment is at sixty degrees to the electric field. Why will torque not be zero?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Medium PhysicsDipole moment becomes three times and electric field becomes half. At the same angle, what is the torque compared to before?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Medium PhysicsDipole moment is doubled and electric field is tripled. At the same angle, what happens to torque?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Medium PhysicsIf the angle between field and area vector changes from thirty degrees to sixty degrees while field and area remain same, how does flux change?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsWhy does only the normal component of electric field contribute to flux through a surface?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsFor a closed surface, taking the area vector outward makes which interpretation easier?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Easy PhysicsWhy is it necessary to choose an area vector for an open surface?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsA surface has area vector toward north and electric field toward south. What is the sign of flux?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Easy PhysicsOnly the positive charge of a dipole is inside a closed surface. If the surface is enlarged to include the negative charge too, how does net flux change?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsA complete electric dipole is inside a closed surface. The net flux is zero, yet why can an electric field exist on the surface?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Hard PhysicsA charge inside a closed surface is moved from the centre to near the surface, but it remains inside. How does the total flux change?Class 12Chapter1: Electric Charges and FieldsContinuous Charge DistributionLevel 20Medium PhysicsA positive charge is placed at the centre of a cube. By symmetry, what fraction of the total flux passes through one face?Class 12Chapter1: Electric Charges and FieldsElectric Charges and their ConservationLevel 20Medium PhysicsA closed surface contains a positive net charge, while several large negative charges are outside it. What is the sign of the net flux?Class 12Chapter1: Electric Charges and FieldsDipole in a Uniform External FieldLevel 20Hard PhysicsThe flux through a surface is initially positive. If only the direction of the area vector is reversed, what will be the new flux?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsA plane surface has area 6 m² and an electric field of 8 N/C. If the angle between the area vector and the field is 60°, what is the electric flux?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium