Announcements
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HW 12 is now due FRIDAY DEC 9 th , 8AM
HW 13 is now due TUESDAY DEC 12 th , 8AM lecture for Week 13.
Recitations next week will cover problems from HW 12 and HW 13
A
Lecture next week will cover (a) problems from HW 13 (if any are left). We will also begin reviewing for the final exam.
Recitation on Monday Dec 12 th will also be a review for final
C

ICLICKER QUESTION #0
Option Review for the Final exam will be on MONDAY Dec 19 th at the following time:
A) 8:30-11AM
B) 11:30-2pm
C) 2:30-5pm
B
D) None of these times are good, I would prefer a different day.
A
C

Show Active Figure 33.3 of Phasor

Clicker Question #1
Figure 33.4
1. (a)
2. (b)
3. (c)
Consider the voltage phasor in Figure 33.4, shown at three instants of time. Choose the part of the figure that represents the instant of time at which the instantaneous value of the voltage has the largest magnitude.
C

RMS current

Current LAGS Voltage in Inductor
Show Active Figure 33.6

Clicker Question #2
Consider the AC circuit in Figure 33.8. The frequency of the AC source is adjusted while its voltage amplitude is held constant. When does the light bulb glow the brightest?
Figure 33.8
1.
It glows brightest at high frequencies.
2.
It glows brightest at low frequencies.
3.
The brightness is the same at all frequencies.

Current LEADS voltage in a Capacitor
Show Active Figure 33.10

Clicker Question #3
Consider the AC circuit in Figure 33.12.
The frequency of the AC source is adjusted while its voltage amplitude is held
B the brightest?
Figure 33.12
1.
It glows brightest at high frequencies.
2.
It glows brightest at low frequencies.
3.
The brightness is the same at all frequencies.
A
C

RLC Series Circuit

Phase Relation of various voltages

Clicker Question #4
Label each part of Figure 33.16, (a), (b), and (c), as representing X
L
(a).
> X
C
, X
L
= X
C
, or X
L
< X
C
. Describe figure
Figure 33.16
1. X
L
> X
C
2. X
L
= X
C
3. X
L
< X
C
HINT:
C

Clicker Question #5
What is the impedance of a series RLC circuit at resonance?
1. larger than R
2. less than R
3. equal to R
4. impossible to determine
Z

R
2 
(

L
  c
)
2

Transformer can “step up” or “step down” the voltage.
B
A
C