Recap_Template

Module 3 : MAGNETIC FIELD

Lecture 20 : Magnetism in Matter

Recap
In this lecture you have learnt the following
	The response of different substances to magnetic field are different. In paramagnetic material the magnetization in
	parallel to the direction of the external field. Diamagnetism aroses due to Lenz's law.
	A ferromagnetic material shows memory effect, i.e., hysteresis.
	Ampere's law is modified in the presence of a magnetic material. The ampere's law for the H-field is determined by
	free currents.
	When a current passes through circuit containing a capacitor, the continuity of current is established by defining a
	displacement current through the capacitor.
	By solving the Maxwell's equations in free space, propagating electromagnetic waves was studied. Electromagnetic
	waves can carry both energy and momentum.
	Congratulations! you have finished Lecture-20. To view the next Lecture select it from the left hand side of the page.