IGNOU PHE 9 2016 - a) Write down Maxwell’s field equations for free space and obtai

Question

a) Write down Maxwell’s field equations for free space and obtain expressions for

(i) velocity of e.m. waves, and

(ii) Poynting Vector. Also discuss its significance.

13 Nov 2017

Answer :

Word Count : 349

Gives an expression for the Pointing vector:Maxwell's derivation of the electromagnetic wave equation has been replaced in modern physics education by a much less cumbersome method involving combining the corrected version of Ampère's circuital law with Faraday's law of induction.

To obtain the electromagnetic wave equation in a vacuum using the modern method, we begin with the modern 'Heaviside' form of Maxwell's equations. In a vacuum- and charge-free space, these equations are:

Image ignouacademy-com--p-down-83942

Image ignouacademy-com--p-free-41954

These are the general Maxwell's

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