EE142
Mid-Term 2
Dr. Ray Kwok
Name: (Last) _ (First) _
1. Glass isosceles triangular prisms shown in Figure are used in optical instruments. If
r = 4 for glass, calculate the percentage of the unpolarized, normally incident light
power reflected back by t
EE 142
Formula Sheet
CHAPTER 6
Time-Varying
Fields and Maxwell's
Equations
Faraday's Law
=
d
,
dt
!
d ! !
d
=
ds (Basic
c
dt s
Formula)
!
!
(point form)
=
t
Transformer emf
!
B !
.ds
c d = s
t
(Integral form)
Motional or flux-cutting emf
" "
"
= (u )
EE 142
Formula Sheet
CHAPTER 6 Time-Varying
Fields and Maxwell's
Equations
Faraday's Law
d
,
dt
d
d
ds
dt s
c
(Basic Formula)
t
(point form)
Transformer emf
B
c d s t .ds
(Integral form)
Motional or flux-cutting emf
u d
c
General form of Fara
MT a
EE 142 TEST 1 SPRING 2010
u._._._._._._._.:_._._._._._.=._._:-_._._~.a_._._w._._._._._._._._._._H._.~:H_
l. A conducting sliding bar oscillates over two parallel conducting rails in a constant
magnetic eld E = 20.5 (T) as shown.
The positicn of the
EE 142 TEST 2 Spring 2010 NAME . -
l. A signal generator is to feed equal power through a lossless transmission line of characteristic impedance
Z0 = 509 to two separate resistive loads as shown. Quarter-wave transformers are used to match the loads to th
EE 142 TEST 2 SAMPLE (F05) NAME - -
1. Find the input impedance Zin to the cascaded lossless transmission lines as shown.
(25 points)
201 = 203:
2. A student observes the envelope of the voltage standing-wave on the transmission line
simulator TL
EE 142, Fall 08
Mid-Term 1
Dr. Ray Kwok
Name: (print) _
1)
Find the direction of the current in the resistor R shown in Figure at each the
following steps:
(a) at the instant the switch is closed,
(b) after the switch has been closed for several minutes,
EE142
Dr. Ray Kwok
The conducting cylinder shown in figure rotates about its axis at 1200 revolutions per
minute in a radial field given by B = 6 (T). The cylinder, whose radius is 5 cm and
height is 10 cm, has sliding contacts at its top and bottom conne
2.
Kirchhoff's
I
V
RzI (V +
z ) = 0
t
t
V
I
= IR L
t
t
Current Sum
V ( L z )
dV
V
z ) + (C z )
+ V (Gz )
dt
t
I
V
= C
VG
z
t
again wave eqn.
I = (I +
2V
I
I
= R L ( )
2
z
t
t z
V
2V
V
= + RC
+ RVG + LC 2 + LG
t
t
t
2
2
V
V
V
RVG
0 = 2 LC 2 ( RC + LG
From class lecture
known :
z
z
I ( z , t ) = I + f + (t ) I f (t + ),
v
v
I
V
= C
, and
z
t
1
v=
LC
z
z
let's define + = t and = t +
v
v
+
+
1
= ;
=1
v
z
t
f + ( + )
+
1
= f + ' ( + )
= f + ' ( + )
v
z
z
z
v
1
=+ ;
=1
v
z
t
f ( )
1
= f ' ( )
= + f '
Chapter 7 continued
EE142
Oblique Incidence of Plane Waves
at Plane Boundaries
Snell's law of reflection
r = i
Snell's law of refraction for
Exam 2 Formula
Dr Mostafavi
Transmission coefficient for parallel
polarization
sin t
1
r 1
1 = 2
=
=
sin i
2
r 2
b
EE 142, Fall 09
Sample Mid-Term 1
Dr. Ray Kwok
Name: (print) _
1) Find the direction of the current in the resistor R shown in Figure at each the
following steps:
(a) at the instant the switch is closed,
(b) after the switch has been closed for several mi
EE 142, Fall 09
Mid-Term 1
Dr. Ray Kwok
Name: (print) _
1)
A 50-cm long metal rod rotates about the z-axis at 180 revolutions per minutes,
with end 1 fixed a the origin as shown in figure. Determine the induced emf V12 if B
= 0.3 mT along the z-axis.
y
B
EE142, Fall 2011
Sample Mid-Term 1
Dr. Ray Kwok
1) A RHCP electromagnetic wave is propagating in the -x direction in a lossless medium of
r = 4 and r = 9 at a frequency of 1 GHz. The electric field amplitude is 5 V/m along the
z-axis at t = 0. Write an ex
EE 142
Fall 00
Sample Mid-Term 2
Dr. Ray Kwok
1) A parallel-polarized plane wave is incident from air onto a dielectric medium with r = 9 at
the Brewster angle. What is the refraction angle?
2) A plane wave is propagating in a lossless medium of r = 4 and
EE 142
Fall 10
Sample Mid-Term 2
Dr. Ray Kwok
Student Name : (print) _
1) An unpolarized but focused beam of light ( = 700 nm) is shined onto a 2-cm thick piece
o
of glass (n = 1.43) at an angle of 55 from normal. Calculate the relative power (in dB,
rela
Mid-term 1
Fall 10
SJSU EE142
Electromagnetic Fields & Waves
Student Name : (print) _ ,
(Last)
Instructor: Dr. Ray Kwok
_ _
(First)
1) [30 pts] A RHCP electromagnetic wave is propagating in the -x direction in a lossless
medium of r = 4 and r = 9 at a fre
Problem 8.34 An antenna with a load impedance : (75 +125) 51 is connected to
a transmitter through a 50-9 lossless transmission line. If under matched conditions
(SO£2 load), the transmitter can deliver 10 W to the load, how much power does it
deliver to
Problem 8.45 A 50-9 lossless tine 0.61 long is terminated in a ioad with
ZL z (50 +j25) Q. At 0.3). from the load, a resistor with resistance R = 30 $2 is
connected as shown in Fig. 8-43 (P8.45(2g). Use the Smith chart to nd Zn.
2mm!» zo=5on 309 zo=50s2
Mid-term 1B
March 20, 2003
SJSU EE142
Electromagnetic Fields & Waves
Instructor: Ray Kwok
Student Name : (print) _ , _
(Last)
(First)
Session (circle one) #1 TR 11:30-12:45 / #2 MW 4-5:15
1) The electric field intensity of a spherical wave in free space i
Sample Mid-term 1
10/8/07
Student Name : (print) _ ,
(Last)
SJSU EE142
Electromagnetic Fields & Waves
Instructor: Dr. Ray Kwok
_ _
(First)
1) A plane wave is propagating in the -x direction in a medium of r = 4 and r = 9 at a
frequency of 1 GHz. The elect