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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।

PhysicsIf the angle between the electric field and the area vector changes from 30° to 60°, how does the flux change when the field magnitude and area remain constant?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsWhy does only the component of the electric field normal to a surface contribute to electric flux?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsWhy is the convention of taking the area vector outward useful for a closed surface?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsWhy is it necessary to choose an area vector for an open surface when calculating electric flux?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsFor a plane surface, the area vector points upward while the electric field points downward. What is the sign of the electric flux?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Easy PhysicsA closed surface encloses the positive charge of a dipole, while the negative charge lies outside it. The surface is then enlarged to enclose both charges. What happens to the net electric flux?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, but will the electric field be zero everywhere on the surface?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsA closed surface is changed from a sphere to an irregular shape while the enclosed net charge remains the same. Why does the total flux not change?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsA charge inside a closed surface is moved from the centre to a position near the surface. What happens to the total flux?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsA positive charge is placed at the centre of a cube. By symmetry, what fraction of the total flux passes through each face?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsNet flux through a closed surface is zero, yet field lines leave one part of the surface and enter another part. How is this possible?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsA closed surface contains two positive charges and one negative charge whose net charge is positive. A large negative charge is placed outside. What determines the net flux through the closed surface?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsFlux through a surface is positive. If the area vector of the same surface is reversed while the electric field remains unchanged, what happens to the flux?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsA plane surface has an area of four square metres and is placed in an electric field of ten newtons per coulomb. If the angle between the area vector and the electric field is sixty degrees, what is the electric flux?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 20Medium PhysicsIn a combined question on electric flux and an electric dipole, what should be identified first?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsIf the dipole moment of a dipole is said to be zero but the separation between its charges is non-zero, which conclusion is suitable?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsIf maximum flux through a surface is required, how should the surface be placed relative to the electric field?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Medium PhysicsFor a plane surface, which component of electric field contributes to flux?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Medium PhysicsIf the separation of charges in a dipole is very small but dipole moment is to remain finite, what must be understood about the charge?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Hard PhysicsAt a far equatorial point, dipole field is opposite to dipole moment. If the dipole moment is reversed, what happens to the field direction?Class 12Chapter1: Electric Charges and FieldsElectric Flux and Electric DipoleLevel 19Medium