Q1 Define electric flux and electric flux density. What is meant by negative flux? Explain with diagram. Write SI unit and dimensions of electric flux. Solution

Q2 Derive, using Gauss’ theorem, an expression for the electric field of an infinitely long line of charge having a uniform charge density of λ coulomb/metre. Solution

Q3 State Gauss’ theorem. Give its mathematical expression. Derive an expression for the electric field intensity at any point due to an infinite plane sheet of charge of uniform charge density σ coulomb/metre². Solution

Q4 Derive expression for the electric field ‘just’ outside a charged ‘conductor’. Solution

Q5 State Gauss’ law in electrostatics. Apply it to show that, for a uniformly-charged spherical shell, the electric field inside the shell vanishes, whereas outside it the field is as if all the charge were concentrated at the centre. Solution

Q6 Derive the expression for the electric field E at any point inside a spherically symmetric uniform charged distribution applying Gauss’ law. Solution