Video Tutor: Charged Rod and Aluminum Can
First, launch the video below. You will be asked to use your knowledge of physics to predict the outcome of an experiment. Then, close the video window and answer the questions at
right. You can watch the video ag
A Test Charge Determines Charge on Insulating and Conducting Balls
Learning Goal:
To understand the electric force between charged and uncharged conductors and insulators.
When a test charge is brought near a charged object, we know from Coulomb's law tha
Charged Ring
Consider a uniformly charged ring in the xy plane, centered at the origin. The ring has radius a and positive charge q distributed evenly along its circumference.
E
Part A
What is the direction of the electric field at any point on the z axis
Coulomb's Law Tutorial
Learning Goal:
To understand how to calculate forces between charged particles, particularly the dependence on the sign of the charges and the distance between them.
Coulomb's law describes the force that two charged particles exert
The Electric Field Produced by a Finite Charged Wire
A charged wire of negligible thickness has length 2L units and has a linear charge density A. Consider the electric eld E
at the point P, a distance d above the midpoint of the wire. y
(f
H.
H
Part A
Th
The Trajectory of a Charge in an Electric Field
An charge with mass m and charge q is emitted from the origin, (ac, y) = (0,0). A large, flat screen is located at a: = L. There is a target on the screen at y position yh, where
yh > 0. In this problem, you
The Electric Field inside a Conductor
Learning Goal:
To understand how the charges within a conductor respond to an externally applied electric eld.
To illustrate the behavior of charge inside conductors, consider a long conducting rod that is suspended b
Electric Dipole in an Electric Field
Point charges q1 = 4.00 HC and q2 = + 4.00 110 are separated by distance 4.00 mm , forming an electric dipole.
Part A
Find the magnitude of the electric dipole moment.
Express your answer in coulomb meters to three sig
Exercise 21.5
Neurons are components of the nervous system of the body that transmit signals as electrical impulses travel along their length. These impulses propagate when charge suddenly
rushes into and then out of a part of the neuron called an axon. M
Charging an Insulator
This problem explores the behavior of charge on realistic (i.e. non-ideal) insulators. We take as an example a long insulating rod suspended by insulating wires. Assume that the rod
is initially electrically neutral. For convenience,
Pressure of a gas sample as a function of temprature (Kelvin)
T(K)
77
196
289
367
424
659
P(atm)
0.118
0.318
0.459
0.579
0.671
1.047
1.2
1
f
R
0.8
Pressure (atm)
0.6
0.4
0.2
0
0
10
Pressure (atm)
1.2
1
f(x) = 0.0015879996x - 0.0005092049
R = 0.9998383297
Homework (Chapter#1) (more complete solutions for a few selected problems)
NOTE: only the important steps are shown
Q.1.12:
Q. 1.42:
magnitude of
Q 1.52:
Homework (Chapter#7) (more complete solutions for a few selected problems)
NOTE: only the important steps are shown
7.33: A small block with mass 0.0400 kg is moving in the xy-plane. The net force on the block is
Homework (Chapter#11) (more complete solutions for a few selected problems)
NOTE: only the important steps are shown
11.11: A diving board of length 3.00 m is supported at a point 1.00 m from the end, and a diver weighing
500 N stands at the free end. The
Homework (Chapter#12) (more complete solutions for a few selected problems)
NOTE: only the important steps are shown
12.35. A rock is suspended by a light string. When the rock is in air, the tension in the string is 55.9 N. When the
rock is totally immer
Revision-1: A Brief Overview on
Chapter 1,2 and 3
At least two of the exam questions will come
out from Chapter 1
Q 1.10: Is the vector a unit vector? Is the vector a unit vector? Justify your answer.
*Important equation:
Q 1.24: Show that no matter what
Homework (Chapter#2) (more complete solutions for a few selected problems)
NOTE: only the important steps are shown
Q. 2.51:
Q. 2.49
Use both formula:
Let +y be upward, 6.00 s after it is thrown,
Homework (Chapter#5) (more complete solutions for a few selected problems)
NOTE: only the important steps are shown
Q. 5.46:
(part a): Find time of revolution, T. Let F
Homework (Chapter#8) (more complete solutions for a few selected problems)
NOTE: only the important steps are shown
8.42: A bullet of mass 7.00g is fired horizontally into a wooden block of mass 1.22 kg resting on
Homework (Chapter#10) (more complete solutions for a few selected
problems)
NOTE: only the important steps are shown
10.13: A textbook of mass 2.10 kg rests on a frictionless, horizontal surface. A cord attached to the book
passes over a pulley whose dia
Midterm Exam (2): Chapter 4-6
PHYS 220A (Class# 16636)
Date: 15 March 2017 (11:00-12:15 noon; Exam Duration: 1 hour)
Total grade: 15% (Warning: Cheating during the exam will be given 0%)
1. A lightweight box (A)
Homework (Chapter#4) (more complete solutions for a few selected problems)
NOTE: only the important steps are shown
Q. 4.16:
w = mg for astronauts pack weight
part a)
!
!
So " = & which we
Electric Current
Electric Current:
Drift Velocity:
Ohms Law:
o
[
]
->
;
,
R:
Resistivity:
Temperature Variation of Resistance:
Temperature dependence of the resistance of an object:
Power in Electric Circuits:
Cost of Electricity:
AC voltage:
AC Current:
Gravity
Newtons Law of Gravitation:
Proof:
->
->
Centripetal acceleration:
or
->
->
Keplers 1st law: the orbit of each planer about the Sun is an ellipse with the sun at one focus
Keplers Second Law: Each planet moves so that an imaginary line drawn from
Rotational Motion and Angular Momentum
Angular and linear velocity:
or
o is the angle of rotation
o angular velocity and linear velocity v
o r is the radius of curvature
Angular acceleration:
Tangential acceleration:
Kinematics of Rotational Motion
[(rad/
Voltage, Electric Energy and Capacitors
so
Electric potential:
Potential Difference:
[
]
Conservation of Energy:
Electron Potential in a Uniform Electric Field:
Relationship between voltage and electric field:
Electric Potential due to a Point Charge:
[
]
Fluid Statics
Density:
[kg/m ]
Pressure:
[
Variation in Pressure with Depth in Fluid:
Atmospheric Pressure:
Forces in a Hydraulic System:
Archimedes Principle/Buoyant Force:
Density and Archimedes Principle:
3
] F=mg ; A=Area
->
->
->
so,
->
->
Specific G
Kinematics: Motion in 1 Dimension
Displacement :
Time:
Velocity:
Velocity:
Acceleration:
Kinematic Equations:
Acceleration due to gravity: a=g=9.80 [m/s ]
Kinematic Equations due to object in free fall
[m]
[s]
[m/s]
[m/s]
[m/s ]
2
2
Kinematics: Motion in