EM Equations

Question 1

Time Harmonic Case – The Complex Poynting Vector: What is the equation for time average dissipated power density?

Answer 1

Question 2

How do you determine the magnitude of wave vector k?

Answer 2

Question 3

How do you determine the wavelength if you know the magnitude of wave vector k, and vice versa?

Answer 3

Question 4

What is the symbol for intrinsic impedance of space and what is its equation?

Answer 4

eta naught

Question 5

How do you find the phasor forms of electric and magnetic fields?

Answer 5

The non-phasor forms have the imaginary components removed.

So if there is a cosine, you need to replace it with a negative exponential value wih the kr parameters as the exponent value.

Question 6

Intrinsic impedance of a medium equation

Answer 6

Question 7

Standing wave ratio equation

Answer 7

Question 8

Reflection by a conductor at normal incidence: What are the reflection and tranmission equations?

What is important to remember?

Answer 8

That this is for normal incidence on a conductor.

Question 9

Continuity equation

Answer 9

Question 10

State them all in integral and differential form

Answer 10

Question 11

What is faraday’s law in differential form?

Answer 11

Question 12

Poynting vector: Expression for the conservation of energy

State the meaning of each term.

Answer 12

Question 13

Whats the integral of this?

Answer 13

Question 14

time-average of the total instantaneous radiated power equation

Answer 14

Note that taking the real part of the complex poynting vector is equal to the time-average of the total instaneous radiated power equation.

Question 15

What are the reflection and transmission coefficients equations of a conductor at normal incidence?

Answer 15