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PPT: Maxwell's Equations & Electromagnetic Waves | Electromagnetic Fields Theory (EMFT) - Electrical Engineering (EE) PDF Download

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The Laws of Electromagnetism
Maxwell’s Equations
Displacement Current
Electromagnetic Radiation
Page 2


The Laws of Electromagnetism
Maxwell’s Equations
Displacement Current
Electromagnetic Radiation
The Electromagnetic Spectrum
Page 3


The Laws of Electromagnetism
Maxwell’s Equations
Displacement Current
Electromagnetic Radiation
The Electromagnetic Spectrum The Equations of Electromagnetism
(at this point …)
E dA
q
ò
·=
e
0
B dA
ò
· = 0
E dl
d
dt
B
ò
· =-
F
B dl I
ò
· = m
0
Gauss’ Law for Electrostatics
Gauss’ Law for Magnetism
Faraday’s Law of Induction
Ampere’s Law
Page 4


The Laws of Electromagnetism
Maxwell’s Equations
Displacement Current
Electromagnetic Radiation
The Electromagnetic Spectrum The Equations of Electromagnetism
(at this point …)
E dA
q
ò
·=
e
0
B dA
ò
· = 0
E dl
d
dt
B
ò
· =-
F
B dl I
ò
· = m
0
Gauss’ Law for Electrostatics
Gauss’ Law for Magnetism
Faraday’s Law of Induction
Ampere’s Law
1
2
The Equations of Electromagnetism
E dA
q
ò
·=
e
0
B dA
ò
· = 0
..monopole..
?
...there’s no
magnetic  monopole....!!
Gauss’s Laws
Page 5


The Laws of Electromagnetism
Maxwell’s Equations
Displacement Current
Electromagnetic Radiation
The Electromagnetic Spectrum The Equations of Electromagnetism
(at this point …)
E dA
q
ò
·=
e
0
B dA
ò
· = 0
E dl
d
dt
B
ò
· =-
F
B dl I
ò
· = m
0
Gauss’ Law for Electrostatics
Gauss’ Law for Magnetism
Faraday’s Law of Induction
Ampere’s Law
1
2
The Equations of Electromagnetism
E dA
q
ò
·=
e
0
B dA
ò
· = 0
..monopole..
?
...there’s no
magnetic  monopole....!!
Gauss’s Laws
4
The Equations of Electromagnetism
E dl
d
dt
B
ò
· =-
F
B dl I
ò
· = m
0
3
.. if you change a
magnetic field you
induce an electric
field.........
.......is the reverse
true..?
Faraday’s Law
Ampere’s Law
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FAQs on PPT: Maxwell's Equations & Electromagnetic Waves - Electromagnetic Fields Theory (EMFT) - Electrical Engineering (EE)

1. What are Maxwell's equations?
Maxwell's equations are a set of four fundamental equations that describe the behavior of electric and magnetic fields. They were formulated by James Clerk Maxwell in the 19th century and are widely regarded as one of the greatest achievements in physics. These equations mathematically express how electric charges and currents generate electric and magnetic fields, and how these fields interact with each other.
2. What is the significance of Maxwell's equations?
Maxwell's equations provide a unified framework for understanding and predicting the behavior of electromagnetic waves, which include visible light, radio waves, and X-rays. They are crucial for the development of technologies such as wireless communication, electromagnetic imaging, and electric power generation. Maxwell's equations also played a key role in the development of Albert Einstein's theory of relativity.
3. How do Maxwell's equations relate to electromagnetic waves?
Maxwell's equations predict the existence and behavior of electromagnetic waves. These equations show that when electric charges accelerate or fluctuate, they create changing electric and magnetic fields. These changing fields then propagate through space as electromagnetic waves. The speed of these waves is determined by the properties of the medium they are traveling through, such as the speed of light in a vacuum.
4. Can Maxwell's equations be simplified?
Maxwell's equations can be simplified under certain conditions or in specific scenarios. For example, in situations where the electric and magnetic fields are static or time-invariant, some terms in the equations can be neglected, resulting in simplified versions known as electrostatics and magnetostatics. Additionally, in materials with specific properties, such as those known as linear isotropic media, Maxwell's equations can be simplified further.
5. How are Maxwell's equations used in practical applications?
Maxwell's equations are used in various practical applications. They form the foundation for the design and analysis of antennas, radio frequency circuits, and electromagnetic devices. They are also essential for understanding and optimizing the performance of optical fibers and lasers. Additionally, Maxwell's equations are employed in the field of electromagnetic compatibility to ensure that electronic devices operate without interference from electromagnetic fields.
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