PA R T I : E L E C T R I C I T Y
UNIT
1
COULOMBS LAW
1.1 Overview
Electricity and magnetism are the central topics to be developed in this course. The one
new big idea we will develop is that we will
Professor Patrick O' Connor
10/12/11
Khashayar Moez
Mohammad Amin Alimardani
Ohms Law
Equipment
o
1-35V DC power supply
o
Ammeter
o
Digital multimeter (DMM) measures voltages (volts) and resistances (
Part 1: Conceptual Questions (3 points each) Circle and justify your answers.
Question 1 :
The long, straight wire AB carries a 14.0-A current as shown. The rectangular loop has long edges parallel
15—111
The ill-leg erate is pulled by the ennstant farce P. Ifthe crate
starts [mm rest and achieve-s a speed elf III] :11}: [I1 5 5. dete r-
mine the magnitude eII FLThe cuefﬁeient nf kinetic frietiu
=Mil—£5.
If the SD—kg crate is subjected to a force of P = EDD N. p
determine its speed when it has traveled 15 In starting from
rest. The coefficient of kinetic friction between the crate
and the gro
13—3.
If the coefficient of kinetic friction between the 50-11 g crate P
and the ground is M = 0.3. determine the distance the
crate travels and its 1.relocitgtI when t = 3 s. The crate starts
from re
12—11}.
The position of a particle along a straight line is given by
5 = {15:3 — 13.5:1 + 22.50 0. where t is in seconds.
Determine the position of the particle when t = 6 5 and the
total distance it
Mechanics of Materials Exam 1 Practice
Hibbeler 8ed.
Chapter 1 & 2
1
Mechanics of Materials Exam 1 Practice
Hibbeler 8ed.
CHAPTER 3
2
Mechanics of Materials Exam 1 Practice
Hibbeler 8ed.
3
Mechanics o
STATICS FORMULAS
Sine Law
Moments
Moment 2D
A
B
C
=
=
sina
sinb
sinc
MO = F d
Moment 3D
Cosine Law
A2 + B 2 2ABcos
Vectors
i
j
k
r F = rx ry rz
Fx Fy Fz
Simplication of a System
Magnitude
FR =
F =
2
2
Electric Forcesand Fields
Problem1
Threepoint charges refixed in placein a right triangle. What is the electricforce on the
a
-cfw_.60-pC chargedueto the othertwo charges?
p
+0.80 C
(t^r1.,*-^ 9 d*
9'
Last Time
Resistors in series:
Current through is same.
General Physics II
Lecture 12
Reffective
Voltage drop across is IRi
R1
R2
R3 .
Resistors in parallel:
1
Reffective
Voltage drop across is same.
Key Concepts:
1) Understanding the behavior of capacitors in
circuits with resistors
2) Understanding the RC time constant
General Physics II
Lecture 13
Todays Plan:
1) Examples with switches
closing
Biot-Savart Law:
What is it?
dB
Fundamental law for determining the
direction and magnitude of the magnetic
field due to an element of current
General Physics II
Lecture 16
0
4
I ds r
r2
We can use th
Last Time:
Force on a moving charge
General Physics II
Lecture 15
F
qv B
This Time:
z
Force on a current-carrying wire
F q
Todays Concept:
y
vi B
F
i
Torques
F qNvavg B
N nAL
I qnAvavg
I
F
Electrici
Magnetic Observations
Bar Magnets
N
S
N
S
S
General Physics II
Lecture 14
N
N
S
Compass Needles
N
S
Todays Concept:
Magnetic Force on Moving Charges
F
qv B
Magnetic Charge?
N
S
cut in half
N
S
Elect
Simple Capacitor Circuit
Q
General Physics II
Lecture 10
V
V
C
Q
C
VC
Todays Concept:
Q
Capacitors
(Capacitors in a circuits, Dielectrics, Energy in capacitors)
This Q really means that the battery ha
Part 1: Conceptual Questions (3 points each) Circle and justify your answers.
Question 1:
(“hinge =2
—q
(,‘luu'ge =l _ ~
The electric potential due to a point charge approaches Zero as you move far