Question
How are em waves produced by oscillating charges?
Draw a sketch of linearly polarised em waves propagating in the Z-direction. Indicate the directions of the oscillating electric and magnetic fields.
OR
Write Maxwell's generalisation of Ampere's circuital law. Show that in the process of charging a capacitor, the current produced within the plates of the capacitor is I = 
, where 
is the electric flux produced during charging of the capacitor plates.
Solution
A moving charge produces both electric and magnetic fields, and an oscillating charge produces oscillating magnetic and electric fields. These oscillating electric and magnetic fields with respect to space and time produce electromagnetic waves.
The propagation of electromagnetic waves can be shown as:
OR
Maxwell's generalization of ampere's circuital law given by,
Consider that a parallel capacitor C is charging in a circuit.
The magnitude of electric field between the two plates will be, 
, is perpendicular to the surface of the plate.
Electric flux through the surface will be, 
