Physics 241 - Electric Potential and Potential Energy
1: a: A charge Q is xed in place. A charge q of mass m1 is released from rest a distance
d from Q. Determine the velocity of q as a function of its distance x from Q. (Yes, you
solved this on the elect
Physics 241 - Faradays Law and Magnetism in Matter
1:
a:
b:
c:
d:
e:
Determine (and explain) the direction of the induced current in each loop.
The eld is decreasing in strength.
The current is increasing in strength.
The left loop is pulled away from the
Physics 241 - Gauss Law
1: A solid cube of side length a has one corner at the origin and the opposite corner at
(a, a, a). A constant electric eld E = E0 (cos + sin ) is present in that region of space.
y
z
As the equation implies, the angle is an angle
Physics 241 - Electrostatics
1: You hold a conductor in each hand by an insulating handle. Assume that the conductor
in your left hand is charged and that the conductor in your right hand is neutral.
a: You move the left conductor near the right conductor
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Physics 241 - Inductors and AC Circuits
1a: A circuit is designed as shown (below left). Use L = 5H, R1 = 10, R2 = 2.5 and
= 100V . The switch is ipped to position A. Determine the time required for the power
dissipated by the resistor to reach 75% of its
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Physics 241 - Biot-Savart and Amperes Law
1: Draw the magnetic eld lines associated with the following currents:
2a: An electron and a proton have parallel velocities vp and ve (below left). Determine
the direction of the magnetic force on the electron du
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Physics 241 - DC Circuits
1: You have R1 = 10 and R2 = 30 in a circuit with an = 50V battery.
a: The resistors are connected in parallel. Determine the voltage drop across each resistor,
the current through each resistor and the power dissipated by each r
CE210: Engineering Graphics
Homework #3: Due October 7th, 2013
Provide the bearing for the five wider lines below. Note that some calculation may be necessary if the
appropriate angle was not provided.
Physics 241 Equations
v = dr
dt
|g| = 9.8m/s2
K = 1 mv 2
2
Wnet = K
Fx = dU
dx
d
= dt
1
a = dv
x = x0 + v0 t + 2 at2
v = v0 + at
dt
Fext = ma = dp
w = mg
p = mv
dt
xf
Ug = GM m/r
P = dW
W = xi F dx
dt
ME = U + K
M Ei + Wnoncons = M Ef Wcons = U
2
=rF
=
Physics 241 - Electromagnetic Waves
1: Determine and explain the direction of the induced magnetic eld in each region of space.
You may assume that each region has cylindrical symmetry so that B will be CW or CCW
around the electric eld direction.
a: The
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Exam 1A PHYSICS 241
Firstname l I) {3 Lastname '
Section # TAs Name
February 11, 2013
You must start all problems from the equations on the sheet.
You must show all work to get full credit for the problem.
If you need more space, you may use the back o
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3: A Wire with a circular cross section has a current density described by j = 95% Where
jo is a positive constant. A positive charge Q is moving directly away from the wire with
Physics 241 - Conductors, Insulators and Capacitors
1: The current in a particular wire varies with time as I(t) = (1.5+3t+2t2 ) amps. Determine
the number of electrons that pass by a particular cross section in the wire between 5s and
7s.
2: The current
Electroscopes
Haiwen Zuo
Labs Partner: Brenna Sullivan
TA: Lidens Cheng
PHYS 241
Section: 1B
Paper Submission: Tuesday, September 17, 2013 by 8:00 a.m.
Electronic Submission: Tuesday, September 16, 2013 by 10:30 p.m.
ABSTRACT
In this experiment, we were g