PHYS 210 Saint Marys University of Minnesota AC Circuit Physics Problem Set 9 Hello, I need your help on a homework about AC circuit in Physics. There are 4 questions on this homework. You can either do it by handwriting and scan it, or you can do it in Word document. All the instruction is on the pdf document call “ps9.pdf”. Thanks Physics 210: Problem Set 9

Due Date: April 17, 2020

1. Consider a series circuit with a resistor, a 1.4 H inductor and a 60 Hz generator. The rms

voltage across the resistor is 30 V and the rms voltage across the inductor is 40 V. (a) Find

the resistance of the resistor (b) Find the peak voltage of the generator.

2. Consider a resistor and inductor connected in parallel across an ideal ac source with an

output of E = Emax cos ωt as shown below. (a) Show that the current in the resistor is

IR = (Epeak /R) cos ωt (b) the current in the inductor is IL = (E/XL ) cos(ωt − 90) (c) the

current in the voltage source is I = IR + IL = (E/Z) cos(ωt + δ)

L

R

E

3. Consider the portion of the circuit below where an inductor (L = 2 mH) and capacitor

is connected in series. The capacitor has a width of w = 20 cm and a gap of 2 mm. A

dielectric with dielectric constant of 4.8 is slid back and forth in the gap between the parallel

plate capacitors. If x = w/2 (dielectric is half-way), then the resonant frequency is 90 MHz.

(a) Find the capacitance of the capacitor without an dielectric (b) Find the resonant frequency

for any value of x, i.e., 0 < x < w.
w
x
L
4. In class, we showed that a RLC circuit is governed by the equation
L
dQ Q
d2 Q
+R
+ =0
2
dt
dt
C
Showp
by direct substitution that Q(t) = Q0 exp(−t/τ ) cos(ω 0 t) solves this equation, where
ω 0 = 1/(LC) − 1/τ 2 and τ = 2L/R
1
Purchase answer to see full
attachment

Don't use plagiarized sources. Get Your Custom Essay on

PHYS 210 Saint Marys University of Minnesota AC Circuit Physics Problem Set 9 Hello, I need your help on a homework about AC circuit in Physics. There are

Just from $13/Page

The price is based on these factors:

Academic level

Number of pages

Urgency

Basic features

- Free title page and bibliography
- Unlimited revisions
- Plagiarism-free guarantee
- Money-back guarantee
- 24/7 support

On-demand options

- Writer’s samples
- Part-by-part delivery
- Overnight delivery
- Copies of used sources
- Expert Proofreading

Paper format

- 275 words per page
- 12 pt Arial/Times New Roman
- Double line spacing
- Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Delivering a high-quality product at a reasonable price is not enough anymore.

That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.