Square Loop
A square loop of wire surrounds a solenoid. The side of the square is 0.1 m, while the radius of
the solenoid is 0.025 m. The square loop has a resistance of 30 . The solenoid has 500 turns
and is 0.3 m long. The current in the solenoid is inc
Three Charges
Three charges are arranged as shown in the figure. How much work was necessary to move the middle
charge from infinity into this arrangement (with the other two charges already fixed in place)?
W=
J
Enter
Help
Charges in 1D
A charge of -3.8
Phy102 HW#10
Focal Lens
An object 5 cm high is located 75 cm from a converging lens (X1 = 75 cm) of focal length f1 = 50
cm. A second converging lens of focal length f2 is located 200 cm from the first lens (X2 = 200
cm). An image of the object is to be f
Name: _
Sec.
P102: Quiz 7 Week 8
In an R-L-C circuit, as shown to the left,
the generator produces an alternating
voltage with a maximum ofV 0 =1 OOV and
a frequency off=50Hz. The other circuit
parameters are R = 60Q, C = 50J.LF and
L = O.lH.
R
V(t)
l23.S
Sec.
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P102: Quiz 4 Week 5
Three charged particles with identical mass and initial velocity enter a region of uniform
magnetic field directed out of the page. They undergo circular motion before exiting the
field, with characteristic radii r 1 > r2
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Sec.
P102: Quiz 6 Week 7
D3S
A rectangular loop with total resistance R = 2-3 Q is rotating about the DC axis. At the
instant the loop is in the plane of the paper (as shown in the figure),
it has an induced current I = 3 amps.
B = 1.8 T
A~ ~ ~
B
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Sec. _
P102: Quiz 8 Week 9
A billiard table is similar to a box with perfectly flat mirrors. Follow the trajectory of the
(white) cue ball as ifit were a laser beam which reflects offthe surfaces with angle of
incidence equals angle of reflection.
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Sec. _
P102: Quiz 9 Week 10
A laser beam travels from air (n=l) through a slab of unknown material (n=?) and
another slab of glass (n=l.5) as shown below.
n=l.O
n=1.5
1. Determine n, the index of refraction for the unknown material [3]
2. Determin
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Sec.
P102: Quiz 5 Week 6
Three long parallel wires carry currents I1, hand 1). They are separated by a distanced=
0.35 em. For now, the current in wire #3 is unknown.
I 1=2A-.,.III>-.-
G~A
I 3=?
.
_- - - - - - - - - + - - - - - - - + t d = 0 . 3 5
Sec.
Name: - - - - -
Physics 102: Quiz 1
Two charges arc located on they axis at positions + 2 m and- 2
m respectively. No other charges are present. Each grid is 1
meter.
tRecall:
I
F
= k qltcfw_=
,
E=i
qo
I
6
2
2
k = 9 X 10 J Nm / C
p = ] x 10 1
I
~-'
x
Phy102 HW11
Missing Order
A two slit interference/diffraction pattern is set up (thus for this problem we will take into
account the effects of both diffraction and interference). You are given that the screen is 1.8 m
away from the slits with width .01 m
Phy102_hw12
Photoelectric Effect I
A light source of wavelength, , illuminates a metal and ejects photoelectrons with a maximum
kinetic energy of 1 eV. A second light source of wavelength /2 ejects photoelectrons with a
maximum kinetic energy of 4 eV. Wha
Phy102_HW13
The Hydrogen Atom
A hydrogen nucleus has a radius of 1 x 10-15 m and the electron is about 5.3 x 10-11 m from the
nucleus. Assume the hydrogen atom is a ball with a radius of about 5.3 x 10-11 m and the nucleus
is a ball with a radius of 1 x 1
PHY2049 Fall 2010
Profs. S. Hersheld, A. Petkova
Exam 1 Solution
1. Four charges are placed at the corners of a rectangle as shown in the gure. If
Q1 = 1 C, Q2 = 2 C, Q3 = 1C , and Q4 = 2C , what is the magnitude
of the net force on Q4 ?
Answer: 11.4 N
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Magnetic forces and Particle Motion.
Magnetic forces are more complicated than gravity in several important ways. Unlike gravity, but
similar to the ordinary Coulomb force between charged particles, magnetic forces depend on the
degree to which a p
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