1. For each vector system drawn, write all the vectors in Cartesian (X-Y) notation. (i) B = 20 N
60o
A = 20
30o
3 N
r ^ ^ ^ ^ A = 20 3 N (cos30 x + sin30 y) = 30 x + 10 3 y N r ^ ^ ^ ^ B = 20 N (-cos60 x + sin60 y) = - 10 x + 10 3 y N
r ^ ^ ^ ^ A
1. A square with each side of length L has four charges fixed in place at corner. At two of the corners we have a negative charge Q, while a corner has a positive charge twice as large (+ 2Q). In the final corner is a different charge q. (i) Find th
Physics 122 Homework 05 solutions
1. Determine the current values in each of the three resistors in the circuit right,
and also find the current that the ammeter (A) will read.
I1
1.5
Choose currents and label high & low potentials as I did right.
+
1.0
Physics 122 Homework 06 solutions
1. A particle has a charge of -3.6 C and a speed of 160 m/s when it enters an
area of space where there is a constant magnetic field with a strength of 0.048 T.
The particle enters in different directions as shown in the
Physics 122 Homework 07 solutions
1. A charged particle moves through a region of space containing both electric and magnetic fields. The velocity
of the particle has both x and y components, vx = 4.4 103 m/s, vy = - 2.7 103 m/s. The magnetic field points
Physics 122-401 Spring 2012 Test 2
Time allowed: 50 minutes
Please answer ALL questions
Name: _
Ds: _
Please use this sheet to record your answers to the multiple-choice section of the test. Simply check the box
corresponding to your response A, B, C, D,
Physics 122 Homework 9 due at the beginning of lecture WEDNESDAY 11/ 7/ 12
Name: _
Ds: _
1. The figure shows a simple representation of a power station, which uses high power
lines to deliver electricity to homes. Suppose the current in the line is 200 A
Physics 122 Homework 08 solutions
1. A 88 turn circular coil with an area of 0.150 m2 sits in a region where there
exists a magnetic field into the page, and represented by the graph below. The
coil is an electrical conductor and has a resistance R = 5.5
Physics 122 Homework 10 due at the beginning of lecture WEDNESDAY 11/ 14/ 12
Name: _
Ds: _
1. Television stations broadcast in VHF and UHF (VHF is very high frequency). The VHF bands for digital broadcast
lie within the frequency range of 54.0 MHz and 216
Physics 122 Homework 9 solutions
1. The figure shows a simple representation of a power station, which uses high power
lines to deliver electricity to homes. Suppose the current in the line is 200 A and the
voltage at the power station is 10,000 V. Also s
Physics 122 Homework 10 due at the beginning of lecture WEDNESDAY 11/ 28/ 12
Name: _
Ds: _
1. Light from a distant object falls on a mirror as shown.
The object is sufficiently far from the mirror that was
incident light may be treated as a plane wave. Th
Physics 122 Homework 10 solutions
1. Television stations broadcast in VHF and UHF (VHF is very high frequency). The VHF bands for digital broadcast
lie within the frequency range of 54.0 MHz and 216 MHz. Each channel is assigned a width of 6.00 MHz, and t
Physics 122 Homework 10 solutions
1. Light from a distant object falls on a mirror as shown.
The object is sufficiently far from the mirror that was
incident light may be treated as a plane wave. The radius
of curvature of the mirror is r = 5 m. The light
Physics 122 Homework 08 due at the beginning of lecture WEDNESDAY 10/ 31/ 12
Name _
Ds _
1. A 88 turn circular coil with an area of 0.150 m2 sits in a region where there exists a magnetic field into the
page, and represented by the graph below. The coil i
Physics 122 Homework 07 due at the beginning of lecture WEDNESDAY 10/ 24/ 12
Name _
Ds _
1. A charged particle moves through a region of space containing both electric and magnetic fields. The velocity
of the particle has both x and y components, vx = 4.4
Physics 122 Homework 02 due at the beginning of lecture WEDNESDAY 09/ 19/ 12
Name _
Ds _
1. Three point charges are conveniently positioned in a line as shown (and they are stuck there by other
forces not pictured). All distances are in centimeters, and t
Physics 122 Homework 03 due at the beginning of lecture WEDNESDAY 09/ 26/ 12
Name _
1. A parallel-plate capacitor can be pictured as two very large (near infinite)
plates with opposite charges Q = 12.0 C and areas of 55.0 m2. Three points A, B,
and C are
Physics 122 Homework 02 solutions
1. Three point charges are conveniently positioned in a line as shown (and they are stuck there by other forces not
pictured). All distances are in centimeters, and the charges are 2.6 C, - 4.2 C, and + 6.0 C.
F12
F13
3.8
Physics 122 Homework 01 due at the beginning of lecture WEDNESDAY 09/ 12/ 12
Name _
1. For each of the following equations, solve for ALL the variables.
(i)
7 .2
0 .8
=
2
( L + 3 .4 )
( L 1 .6 ) 2
(ii) 2 a 7 b + 9.5c = 3 and 5.5 a + 3.5b = 5 and 2 a 2.5c
Physics 122 Homework 01 solutions 1. For each of the following equations, solve for ALL the variables. (i)
7 .2 0 .8 = 2 ( L + 3 .4 ) ( L - 1 .6 ) 2
2
7.2 (L + 3.4 ) 2 L + 3.4 = = 0.8 (L - 1.6) 2 L - 1.6
If +3 L + 3.4 = 3L 4.8
L + 3.4 = 3 L - 1.6 2L = 8.
Physics 122 Homework 04 due at the beginning of lecture WEDNESDAY 10/ 03/ 12
Name _
Ds _
1. Two conductors insulated from each other are charged by transferring electrons from one conductor to
the other. After 1.6 1012 electrons have been transferred, the
Physics 120 Homework 3 solutions
1. A parallel-plate capacitor can be pictured as two very large (near infinite) plates with opposite charges Q = 12.0 C and areas of 55.0 m2. Three points A, B, and C are identified. (i) What is the charge per unit area ?
Physics 122-401 Spring 2012 Test 1 Time allowed: 50 minutes Please answer ALL questions
Name: _
Ds: _
Please use this sheet to record your answers to the multiple-choice section of the test. Simply check the box corresponding to your response A, B, C, D,
Physics 122 Homework 05 due at the beginning of lecture WEDNESDAY 10/ 10/ 12
Name _
Ds _
1.5
1. Determine the current values in each of the three resistors in the
circuit right, and also find the current that the ammeter (A) will read.
1.0 V
A
2.0
4.0 V
Physics 122 Homework 04 solutions
1. Two conductors insulated from each other are charged by transferring electrons from one conductor to the other.
After 1.6 1012 electrons have been transferred, the potential difference between the conductors is 15.0 V.
Physics 122 Homework 06 due at the beginning of lecture WEDNESDAY 10/ 17/ 12
Name _
1. A particle has a charge of -3.6 C and a speed of 160 m/s when it
enters an area of space where there is a constant magnetic field with a
strength of 0.048 T. The partic
Physics 122 Homework 12 due at the beginning of lecture WEDNESDAY 12/ 5/ 12
Name: _
Ds: _
1. An object is located to the left of a convex lens with a focal length of 24 cm. The image formed is a real image, and
the image is three times as large as the obj