HW 5, Ch.26 & 27
due 9” Oct.
PY212
October 4, 2015
. The capacitor in Fig. P26.70 is initially uncharged. The switch S is closed at t = 0. (a)
Immediately after the switch is closed, What is the current through each resistor? (b) What
is the ﬁnal charge o

DIFFRACTION AND INTERFERENCE
In this experiment you will demonstrate the wave nature of light by investigating
how light bends around edges and how it interferes constructively and destructively. You
will observe these effects in a variety of situations a

3- Consider light incident on a thin soap
lm, as illustrated in the cross-
sectional side view diagram at right.
The soap lm is supported by a loop
(not shown), which is held vertically.
Onlyasmallportionofthelmhas
been shown: the thickness of the lm
is g

Name Disc
PY212
Discussion Worksheet 12
Please work with your partners on the following exercises.
1. Red light from a distant point source is incident on a mask with two
identical, narrow vertical slits. The photograph at right illustrates the
pattern

Electromagnetic Induction Experiment
In this experiment, the activity will be based on a Phet simulation called
Faradays Electromagnetic Lab, created by a group at the University of Colorado at
Boulder. This group has a number of good simulations of vario

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Powered

PY212 GENERAL PHYSICS II
Fall 2016
Instructors
Prof. Lee Roberts (Sections A1, B1)
Office: PRB 373, Phone: 617-353-2187, Email: [email protected]
Prof. Alex Sushkov (Section C1)
Office: SCI 213, Phone: 617-353-2619, Email: [email protected]
Course Overview
An intro

PY212 Fall 2016: Teaching staff information
First name
Last name
Initials
Email
TFs
Patrick
Timothy
Jilin
Ang
Gaoxiang
Shangran
Anirudh
Xiangyi
Greene
Khouw
Wang
Liu
Mei
Qiu
Chandrasekaran
Meng
PG
TK
JW
ANG
GM
SQ
AC
XM
[email protected][email protected][email protected]

10/28/16
Right-Hand-Rule Pre-Summary
~ = ~r p~ L
~ L
~ =
~
~ = ~r F
6 L
Torque
Angular momentum
!
! !
~ F = IL B
F~ = q~v B
~
~
~ = N IA
~ =
~ B
PY212 Class 14
Sources of the Magnetic Field
(Right-hand Rules)
PY212 Class 14, B.L. Roberts Fall 2016
page1

Announcements
Clickers: We will send out instructions on how to register
your clickers by tomorrow.
Since I am teaching all 12 discussions this week, I have
not had time to sort this out.
PY212 Class 2
The Electric Field
PY212 Class 2, B.L. Roberts Fall

1) For the vectors given on the right, please calculate:
bwigl + 73 . Bil/<1
7 -mumvww~_-vr rimrim wvrw ~- v ~ "uWerranvzuvawnmlmr ,7
Name Disc
PY212
Discussion Worksheet 7 g = A0 (;+ 2j+ 31;)
Please work with your partners on the following exercises. I;

Name Disc
_
2. In each part below, suppose that a single change were made to the original apparatus. For
each case, determine how, if at all, that change would aect the pattern on the screen. SkCtCh
your predictions in the space provided and give a brie

HW 4, Ch.24 & 26, due 5“ Oct.
PY212
September 29, 2015
. The plates of a parallel-plate capacitor are 3.28 mm apart, and each has an area of 9.82mn2.
Each plate carries a charge of magnitude 4.35 x 10—80. The plates are in vacuum. What is
(a) the capacita

HW 5, Ch.26 & 27
due 9th Oct.
PY212
October 4, 2015
1. The capacitor in Fig. P26.70 is initially uncharged. The switch S is closed at t = 0. (a)
Immediately after the switch is closed, what is the current through each resistor? (b) What
is the nal charge

HW 4, Ch.24 & 26, due 5th Oct.
PY212
September 29, 2015
1. The plates of a parallel-plate capacitor are 3.28 mm apart, and each has an area of 9.82cm2 .
Each plate carries a charge of magnitude 4.35 108 C. The plates are in vacuum. What is
(a) the capacit

PY212 Fall 2015
HW 1, due Sep.1l 2015 g0 1“
€21 Ci {fettmi
A negative charge of -0.640uC exerts an upward force of 0.500-N on an unknown charge
|ocated 0.400 m directly above the first charge. What are (a) the value of the unknown
charge (magnitude and si

9.x}.
HW 2, Ch.22, due 18th Sept.
PY212
September 11, 2015
. Some constant and uniform (is. linear) electric ﬁeld of magnitude 12.0 N/C exists in your
lab. You place a ﬂat metallic disk of radius lﬁ-cm in the ﬁeld, such that the disk’s normal (
the unit v

HW 3, Ch.23, due 25th Sept.
PY212
September 23, 2015
1. Draw a picture of the equipotential lines of an electric dipole. Relative to innity, the line
between the two charges represents an inection point in the potential, such that it is a
stationary point

HW 2, Ch.22, due 18th Sept.
PY212
September 11, 2015
1. Some constant and uniform (ie. linear) electric eld of magnitude 12.0 N/C exists in your
lab. You place a at metallic disk of radius 16-cm in the eld, such that the disks normal (
the unit vector whi

PY212 Fall 2015
HW 1, due Sep.11 2015
C.21
1. A negative charge of -0.640 C exerts an upward force of 0.500-N on an unknown charge
located 0.400 m directly above the first charge. What are (a) the value of the unknown
charge (magnitude and sign); (b) the

Special combined discussion section
Friday, October 14th at 5:00 pm
SCI 109
We will go over the exam in detail, and discuss strategies on
how to approach problems.
PY212 Class 11
Multi-loop and RC Circuits
PY212 Class 11, B.L. Roberts Fall 2016
page1/2

Problem 1. [20 points]
Three identical point charges q are placed at each of three corners of a square
of side L.
a) Find the electric eld vector at the vacant corner of the square.
b) Find the electric potential at the vacant corner of the square.
A char

1
PY212
Lecture 3: Electric field, Gausss Law
(Young and Freeman, Ch. 22)
q1
q2
Quick quiz:
Examine the electric field lines
produced by the 2 charges in this
figure. Which statement is true?
Homework#2 is due Friday 9/16, 5pm
(a) q1 and q2 have the same

1
PY212
Lecture 2: Electric field
(Young and Freeman, Ch. 21)
Quick quiz:
Three objects are brought close to
each other, two at a time. When
objects A and B are brought together,
they attract. When objects B and C are
brought together, they repel. From
th

PROBLEM 1 6 points
x=0
+2Q
x = 3 cm
-Q
Two charges, +2Q and Q, are separated by 3 cm as shown above. Consider the electric field due to these two
charges, and nothing else.
[2 points] (a) Is there a point along the line passing through the charges, and at

Name Disc _ M.
PY212
Discussion Worksheet 3
Please begin working immediately with your partners. + a . an
1. Electric Field and Potential between Parallel Plates A
I . r-D
Two very large sheets of charge are separated by a distance 0'.
One sheet has a sur

Problem 1. [20 points]
Three identical point charges q are placed at each of three corners of a square
of side L.
a) Find the electric eld vector at the vacant corner of the square.
b) Find the electric potential at the vacant corner of the square.
A ch

r'which had three components xCM, yCM and ZCM
Name Disc
PY211
Discussion Worksheet 1
Please begin work immediately with your partners on the following.
These exercises are intended to review what you learned about mass distributions, center of
mass, etc