Electric Field Lines - Practice Questions & MCQ

A long cylindrical shell carries positive surface charge $\sigma$ in the upper half and negative surface charge $-\sigma$ in the lower half. The electric field lines around the cylinder will look like figure given in : (figures are schematic and not drawn to scale)

Charges are placed on the vertices of a square as shown. Let $\vec{E}$ be the electric field and V the potential at the centre. If the charges on A and B are interchanged with those on D and C respectively, then

Electric lines of force about negative point charge are

A metallic shell has a point charge ‘q’ kept inside its cavity. Which one of the following diagrams correctly represents the electric lines of forces

The figure shows some of the electric field lines corresponding to an electric field. The figure suggests

Electric lines of force about negative point charge are

Three positive charges of equal value $q$ are placed at the vertices of an equilateral triangle. The resulting electric lines of force should be sketched as in

An uncharged sphere of metal is placed in between two charged plates as shown. The lines of force look like

A charge Q is fixed at a distance d in front of an infinite metal plate. The lines of force are represented by

Direction :   In the following question, a statement of Assertion ( A ) is followed by a statement of reason (R). Mark the correct choice as 

Assertion : Electric lines are always straight and continuous .

Reason : The electric line of force originating or  terminating does not depend on nature of charge .