PHY2250 - Electronics & Circuit Theory Test 2 Practice Test
Questions 1 and 2 refer to the following oscilloscope traces:
#1
Volts/div: 0.5V
Time/div: 20s
#2
Volts/div: 0.1 mV
Time/div: 2s
1. (12 points) Identify each of these characteristics/values for t
PHY2250 "Homework 6". Dr. Hawleys answers.
1. Part of the crossover for a 2-way loudspeaker system has a capacitance of 2 F and a
resistance of 1 k, and has the following schematic:
Vout
Vs
~
a. What is the time constant for this part of the circuit?
b. C
PHY2250 - Electronics & Circuit Theory Practice Test 2
Show all work
Turn off (OFF) all cell phones
Answer on separate paper. Hand in this sheet separately.
Answers on this sheet will not be considered.
100 points total
Questions 1 and 2 refer to the foll
PHY2250 HW3 Answers
1. Find a formula for a loaded voltage divider, i.e. find VOUT as a function of VS, R1, R2, and R3:
R1
VS
R2
VOUT
VOUT
R3
1
"1
R23
1%
= VS
, R23 = $ + '
R1 + R23
# R2 R3 &
2. Shown below is a circuit for providing a variety of output v
PHY2250 - Electronics & Circuit Theory, "Practice" Test 1
Charge on the electron: -1.602 x 10-19 C
Part I. Multiple Choice: For these questions, simply giving the answer will do, i.e. you do not
need to show your work.
1. (4 points) One coulomb-per-second
PHY2250 - HW 4 - "AC, & Cap Intro"
1. Signal A has an amplitude of 3V. Signal B has the same frequency as Signal A, but
has an amplitude of 6V and a phase shift of 90 degrees relative to Signal A. Before
he can apologiiiiiiiize, "Timbaland" plugs both sig
PHY2250 "Homework 6". Dr. Hawleys answers.
1. Part of the crossover for a 2-way loudspeaker system has a capacitance of 2 F and a
resistance of 1 k, and has the following schematic:
Vout
~
Vs
a. What is the time constant for this part of the circuit?
b. C
Seed = 3324. (If you are not the instructor, you can ignore the seed.)
Problem 1. A light bulb passes 515 mA of current when 139 V is applied.
a. What is the bulb's effective resistance?
b. How much power is the bulb using?
Problem 2. If an electric compa
Seed = 3324. (If you are not the instructor, you can ignore the seed.)
* SOLUTION(S) *
Problem 1. A light bulb passes 515 mA of current when 139 V is applied.
a. What is the bulb's effective resistance?
b. How much power is the bulb using?
R = V / I = (13
Seed = 3324. (If you are not the instructor, you can ignore the seed.)
Problem 1. The smallest unit of a compound is:
a) an electron
b) an element
c) a neutron
d) a molecule
Problem 2. Describe the difference between a chemically inert element and a semic
Seed = 3324. (If you are not the instructor, you can ignore the seed.)
* SOLUTION(S) *
Problem 1. The smallest unit of a compound is:
a) an electron
b) an element
c) a neutron
d) a molecule
The correct answer is d) a molecule
Problem 2. Describe the diffe