lecture 5

Lecture 5
AMPERE S LAW This law, in its simple form, states that the line integral of the magnetic induction vector B around any closed path is equal to the product of the permeability ?_o and the net current I flowing across the area bounded by the path:
???B?dl?=?_o I …… (13)
In differential form, this law can be written as
?×B=?_o (J+?D/?t) ……. (14) (How?)
(Where does the second term come from?)
and represents the third of Maxwell s equations.
FARADAY S LAW This law is analogous to Ampere s law in stating that the line integral of the electric field vector E around any closed path is equal to the time rate of change of magnetic flux ?_M passing through the area defined by that path:
???E?dl?=-(d?_M)/dt ……….. (15)
In differential form this law can be written as:
?×E=-dB/dt ………… (16) (How?)
Eq. (16) represents the fourth of Maxwell s equations.

AMPERE S LAW This law, in its simple form, states that the line integral of the magnetic induction vector B around any closed path is equal to the product of the permeability ?_o and the net current I flowing across the area bounded by the path:
???B?dl?=?_o I …… (13)
In differential form, this law can be written as
?×B=?_o (J+?D/?t) ……. (14) (How?)
(Where does the second term come from?)
and represents the third of Maxwell s equations.
FARADAY S LAW This law is analogous to Ampere s law in stating that the line integral of the electric field vector E around any closed path is equal to the time rate of change of magnetic flux ?_M passing through the area defined by that path:
???E?dl?=-(d?_M)/dt ……….. (15)
In differential form this law can be written as:
?×E=-dB/dt ………… (16) (How?)
Eq. (16) represents the fourth of Maxwell s equations.