Given the expression for electric field intensity at a point due to a thin infinitely long straight wire. Give the meaning the of symbols used.

Derive an expression for electric field intensity at a point due to point charge.

Derive an expression for electric field intensity at a point due to point charge.

Find an expression for electric field intensity due to a point charges.

Give the expression for electric field intensity due to an infinite thin plane sheet. Give the meaning of the symbols used.

Apply Gauss's law to derive the expression for electric field intensity due to an infinitely long straight uniformly charges wire. What is the direction of the field intensity if it is positively charged?