Physics 9C Practice Exam Solutions
1.
y
A charged particle travels through an electric eld
whose equipotentials are as diagrammed to the right.
The particle started at point A, and is currently at point
B, where it ismoving to the right. Which of the
x
fo
PHYSICS 9C
MIDTERM 1
April 23, 2007
I certify by my signature below that I will abide by the UC Davis Code of Academic Conduct. This includes not copying from anyone else's exam not letting any other student copy from my exam not discussing thi
PHYSICS 9C
MIDTERM 1
April 24, 2006
Problem 1. (2 points) Consider two negatively charged particles with Q1= -1 C and Q2= -2 C. Force between them is: A) B) C) D) E) Attractive; force on particle 1 is twice larger than force on particle 2. Attract
PHYSICS 9C
MIDTERM 1
February 13, 2008
I certify by my signature below that I will abide by the UC Davis Code of Academic Conduct. This includes not copying from anyone else's exam not letting any other student copy from my exam not discussing
Physics9CB
MidtermExam#1
Winterof2014
1.
Two point charges q1 = 1 nC and q2 = + 25 nC are held 4 cm apart as shown
below.
(a)
(10 points) Along the straight line connecting the two charges, at which point the
total electric field is equal to zero? (Choose
Physics 9C-A
1.
(a)
(b)
(c)
(d)
2.
(a)
(b)
(c)
Final Exam
Winter of 2008
Each of two identical spherical volumes with radius R is uniformly charged with a
positive charge Q throughout the volume. One sphere is centered at the origin and
the other at x = 2
A
PHYSICS 9C MIDTERM 1 May 15, 2006
LAST NAME:
FIRST NAME:
SECTION:
Problem 1 (2 points). If the potential profile has a form of stairs, at which points the electric field due to such profile reaches its largest values? A. At the bottom of stairs
A
PHYSICS 9C FINAL EXAM June 10, 2006 LAST NAME: FIRST NAME: SECTION:
Problem 1 (two points). The diagram shows two charges +Q and -Q. The electric field at point P on the perpendicular bisector of the line joining them:
Solution: Positive charge i
Physics 9C-D
Midterm Exam #2
Name:
1.
In the following circuit, the capacitance for C1 is 6.9 mF, and that for C2 is 4.6
mF.
(a)
(b)
(15 points) Find the equivalent capacitance of the network between a and b;
(10 points) When Vab = 420V, find the charge o
Physics 9C-A
Midterm Exam #2
Winter 2008
1. (a) (b)
In the following circuit, the capacitance for C1 is 9 F, and that for C2 is 6 F. (10 points) Find the equivalent capacitance of the network between a and b; (10 points) When Vab = Va - Vb = 120V, find th
Physics 9C-A
1.
(a)
(b)
(c)
(d)
(e)
(f)
2.
(a)
(b)
(c)
(d)
(e)
3.
(a)
(b)
Midterm Exam #2
Winter of 2011
Capacitors in a network and energy storage
In the following circuit, C1 = C2 = C3 = 4 F, C4 = 12 F, and Vab= Va Vb = 24 V.
(5 points) Find the equival
Physics 9C-A
Midterm Exam #1
Name:
1. (a) (b)
Three identical charges - q are placed at each of three corners of a square of side L. (10 points) Find the magnitude and the direction of the net electric force on a point charge 5q placed at the vacant corne
Physics 9C-A
Midterm Exam #2
Winter of 2012
1.
(a)
Electric potential:
(10 points) Two solid insulating spheres, each 0.5 m in diameter, are placed 1 m
apart center to center. One carries a uniformly distributed charge +Q; the other
carries a uniformly di
Physics9CA
1.
(a)
(b)
MidtermExam#1
Winterof2012
Two point charges q1 and q2 are held 8 cm apart as shown below. Another point
charge Q = + 2 C of mass 5 g is initially located 5 cm from each of these two
charges and then released from rest. The initial a
Physics9CA
MidtermExam#1
Winterof2011
1.
Three point charges, q1, q2, Q, are placed at three corners of a rectangle.
(a)
(10 points) Find the magnitude and direction of the net electric force on Q.
(Hint: choose a coordinate system first).
(b)
(10 points)
Physics9CA
MidtermExam#1
Winterof2013
1.
Two point charges q1 = + 2 nC and q2 = + 8 nC are held 8 cm apart as shown below.
(a)
(15 points) At what point along the line connecting the two charges is the total
electric field due to the two charges equal to
Physics9CB
1.
(a)
(b)
2.
(a)
(b)
(c)
MidtermExam#2
Winterof2014
You have a large collection of 50 nF capacitors available. Find suitable
combinations of these capacitors that have the following equivalent capacitance.
(Justify your answers. More than one
Physics9CA
1.
(a)
(b)
2.
(a)
(b)
(c)
3.
(a)
(b)
(c)
4.
(a)
(b)
(c)
MidtermExam#2
Winterof2013
You have a large supply of 100 nF capacitors available. Show how you connect
some of them to produce a system of these capacitors with the equivalent
capacitance
Physics9CC
2007
MidtermExam#1
Name:
1.
Three point charges, q1, q2, Q, are placed along a straight line as shown.
(a)
(10 points) Find the magnitude and direction of the net electric force on Q.
(b)
(10 points) Find the magnitude and direction of the net
Physics9CC(2006)
MidtermExam#2
1.
In the following network of capacitors, C1 is 4 F and C2 is 2 F. A 24-V
battery is connected to the network as shown. The switch S is initially open.
(a)
(10 points) Find the charge on the C2 capacitor that is already con
E POTENTIAL ENERGY: (measured in joules) that results from conservative Coulomb forces and is associated with the configuration of a particular set of point charges within a defined system.
PE UNIFORM FIELD: move up or down, then deltaUg = mg delta(h), si
SELF-INDUCTANCE: induction of a voltage in a current-carrying wire when the current in the wire itself is changing
- when you connect a 70v light to a 9v battery with an inductor (wrapped around coil), then the light to will turn on momentarily when you d
RESISTIVITY: p = E/J where J is current density. Based of material; metals = small.a measure of the resisting power of a specified material on a current. Measured by constant coefficient (a)
- temperature coefficient of resistivity: resistance-change fac
Physics9CC(2006)
MidtermExam#2
In the following network of capacitors, C1 is 4 F and C2 is 2 F. A 24-V
battery is connected to the network as shown. The switch S is initially open.
(a)
(10 points) Find the charge on the C2 capacitor that is already connec
Scalar Product
Math Stuff
cos
Vector Product
sin
Permittivity of free space
Quadratic Formula
2
(ax +bx+c=0)
Permeability of free
space
Surface Area of Sphere
Volume of Sphere
4
2
2
Coulomb Constant
Constants
1
8.99 10 /
4
1
8.85 10 /