Consider an electromagnetic harmonic plane wave, where the peak
electric field amplitude is 1 N/C.
a) What is the irradiance of this plane wave?
b) Consider such a wave with a frequency in the centre of the
visible band of the electromagnetic spectrum. What is the number of
photons passing through an area of 1 m2 in 1 second?
(Assume the area the light is passing through is perpendicular to
the wave’s propagation direction).
c) Now consider two additional waves...
1. find (a)electric field and (b)magnetic field of TE
waves in a rectangular waveguide.
2. find (a)electric field and (b)magnetic field of
coaxial transmission line.
The electric field of an electromagnetic wave that propagates in
a vacuum is given by: ?⃗ (?, ?) = 2 cos (α? - ω?) ? + 2 sin (α? -
ω?) ?, ?? (?/?); ???? α ? ω ??? ??????????
a) What is the amplitude E0 of the electric field, its angular
frequency, period, frequency f, wave number | ?⃗ |, wavelength, its
speed u and its phase constant φ?
b) I) Determine the electric field in the x-y plane...
Q1. What was Maxwell's prediction for the speed of
electromagnetic waves in terms of
electric and magnetic constants? What value did he
obtain for speed of electromagnetic waves?
Q2: Describe how a hydroelectric power generator
works.
Q3: What kind of electric current do transformers work
with best?
Q4: How is inductance defined, and what is the
expression for inductance of a solenoid with
length L, radius R, N turns, and current I flowing
through?
Q5: Write the equation for the...
1 a) What is the approximate electric field strength and
magnetic field strength of the electromagnetic waves radiated by a
60-W lightbulb, as measured 5.5 m from the bulb? You can assume
that the bulb is 100% efficient in converting electrical energy to
light energy.
b.) Incandescent light bulbs are very inefficient. Find the
electric field strength and magnetic field strength assuming 5%
efficiency.
Please show all work, thank you!
1) Find the electric field inside a 10 microFarad parallel plate
capacitor when connected to a 6V battery if the gap between the
capacitor plates is filled with air and is 10mm apart. Repeat your
calculation if the gap is filled with paper with a dielectric
constant of 4?
Q1: Name at least 4 assumptions that went into showing that
electromagnetic plane waves exist.
Q2: Write out the units and names of these quantities related to
electromagnetic waves: frequency, omega, lambda, k=2pi/lambda,
E_0, B_0.
Q3: What is the exact relationship between the area (plays a
part in the magnetic flux) and the integration path in the Eds line
integral in Faraday's law? Consider the area to flat, and to be a
vector, defined as usual.
Q4; When does one...
At a certain location, electromagnetic wave 1 is measured to
have an average electric field of Eav = 152 N/C, and
electromagnetic wave 2 is measured to have an average magnetic
field of Bav = 0.87 µT.
a. (5 points) Calculate the average intensity of each wave.
b. (5 points) If the electromagnetic waves are being measured
0.54 m from their light sources (assume that they are emitting
light uniformly in all directions), what average power is each
source emitting?...