$4.$

a$.$ Derive the Maxwell's first Equation in point form using Ampere's circuital law.

$(5$ Marks$)$

b$.$ Derive the Maxwell's Second Equation in point form using Faraday's law.

$(5$ Marks$)$

c$.$ Derive the Maxwell's $\backslash (3^\{\backslash$text $\{$rd $\}\}\backslash )$ Equation in point form using Gauss law.

$(5$ Marks$)$

d$.$ With the help of a neat diagram, explain physics of uniform plane waves. Also mention their properties.

$(5$ Marks$)$