Physics 1520General Physics II
High Point University
Professor: Dr. Aaron Titus, 361 Congdon Hall, [email protected], 336-841-4668, @physicslogos.
My personal mission is to encourage you to be a
CH 16-2 Coulombs Law
For a conductor, charge distributes itself across the surface in response to external forces. In equilibrium, the net force on charge is zero.
For an insulator, atoms become polarized in response to external forces.
CH 16-3 Electric Field
A charged particle creates an electric eld at every point in space. At every location, the electric eld
points away from a positively charged particle, and it points toward a negatively charged particle. The
CH 17-1 Electric Potential Energy
If two charged particles interact (via the electric or gravitational force perhaps), the energy associated
with the interaction of a pair of interacting particles is called potential energy. The electric
CH 16-4 Electric Field
When a conducting object has a net charge, and/or when the conducting object is placed in a region in
which there is an electric eld, a number of conditions apply when electrostatic equilibrium is reached.
CH 17-2 Electric Potential and Voltage
The electric potential V at a distance r from a charged particle is
For a positively charged particle, the potential V is positive and decreases for points further from the
CH 18-2 Series and Parallel Resistors
Kirchhos Current Law (KCL), also called the Junction Rule, is that the total current owing into
a junction is equal to the total current owing out. It is a statement of conservation of charge (also
CH 18-3 Charging and Discharging Capacitor
For a charging capacitor, current ows and charge builds up on each plate. Eventually the electric
eld pushing the current is balanced by the opposite electric eld due to the ch
CH 20-1 Faradays Law
Magnetic ux is a measure of the number of magnetic eld lines that pass through a given area, A.
The magnetic ux is
mag = BA cos()
where is the angle between the magnetic eld and the area vector A. The area vector has
transverse wave, longitudinal wave
amplitude, frequency, period, wavelength, wavenumber
Relationship of wavelength, frequency, and wave speed
For a transverse wave on a string:
CH 20-2 Motional EMF
If a piece of metal is moving through a magnetic eld, the magnetic force on electrons causes the metal
to become polarized. In the example shown below, the left-hand rule gives a magnetic force on an
electron that is
CH 20-3 Electromagnetic Waves
We have seen so far that:
1. A charged particle creates an electric eld because it has charge. (Thats what charge does!)
2. A moving charged particle creates a magnetic eld because it has charge and because i
CH 19-1 Magnetic Field
A moving charged particle creates a magnetic eld everywhere in space around it. If the particle has
a velocity v, then the magnetic eld at this instant is tangent to a circle around the axis of v. The
direction of t
CH 16-1 Charge
Solids are made of atoms in a lattice. Protons are bound in the nucleus. Electrons orbit the nucleus.
The charge of an electron is qelectron = e = 1.6 1019 C. The charge of a proton is qproton = e =
1.6 1019 C. The variable
CH 18-1 Current
An ideal battery maintains a constant potential dierence across its terminals regardless of what the
battery is connected to. The potential dierence across a battery when it is not connected to a circuit
is called the batt
CH 19-2 Force by Magnetic Field on a Moving Charged Particle
A magnetic eld exerts a force on a moving charged particle, if the velocity of the particle is NOT
parallel or antiparallel to the magnetic eld. The magnitude of the magnetic fo
24-3 Vision and Corrective lenses
To focus is to make adjustments so that a screen is at the same location as a real image.
The human eye and a camera are strikingly similar:
1. Both systems use a convex lens to create an image. (The eye
In the ray model, light is made of rays that travel in straight lines until they encounter an interface
between two dierent materials. Rays are perpendicular to wave fronts (a surface connecting points
along the waves that w
CH 21-4 Standing Sound Waves
The pressure at an open end of a pipe is atmospheric air pressure, so it is constant and is a node. The
displacement of the air at an open end of a pipe is an antinode.
The pressure at a closed end of a pipe
for a spherical wave: A = 4r2
Absolute sound intensity level:
(10 dB) log10
where I0 = 1 1012 W/m2
Relative sound intensity level:
(10 dB) log10
Doppler eect. v is the speed of sound in the
CH21-3 Standing Waves
When two waves are add to give a larger wave, it is called constructive interference. When the two
waves add and give a smaller wave, it is called destructive interference.
A wave that reects from a xed boundary is
24-2 Thin Lenses
For a convex lens, parallel light rays converge through the focal point. The focal length of a convex
lens is positive. The lens is a converging lens.
For a concave lens, parallel light rays diverge away from the focal p
23-2 Spherical Mirrors
For spherical mirrors, the focal point is at half the radius of curvature.
For a concave mirror, rays parallel to the principal axis reect and converge through the focal point.
The focal length is positive.
Physics 1520, Spring 2014
Quiz 2A, Form: A
Section 1. Multiple Choice
Questions 13: Two point sources of waves emit radio waves of wavelength 0.5 m as shown below.
Point Q is on line C and on the perpendicular bisector of the two sou
Index of refraction n = v .
When light is incident on the interface (i.e. boundary) between two media, part of the wave reects
and part of the wave transmits into the next medium. The reected ray ones the law of reectio