PHYS 1410 (Winter 2013) - Exam
Show all work clearly in order to get futl credit. Points can be taken off if
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Ch. 16.1 Potential Difference and
Electric Potential Energy
The Coulomb force is a conservative force.
It is possible to define an electrical potential
energy function with this force.
Work done by a conservati
PHYS 1410 6.0: PHYSICAL SCIENCE (Fall 2011)
Class test #1
Oct 5, 1:30 p.m. 2:20 p.m. = 50 min
Formulae at the end and calculators = only aid; total = 19 points (18 points = 100 %)
Note on units: You dont have to write out the units in in
PHYS 1410 6.0: PHYSICAL SCIENCE (Fall 2011)
Class test #2
Nov 16, 1:30 p.m. 2:20 p.m. = 50 min
Formulae at the end and calculators = only aid; total = 21 points (20 points = 100 %)
Note on units: You dont have to write out the units in i
Ch. 15.3 Coulombs Law
Identified forces acting
Coulomb shows that an electric force F has the
PHYS 1410: PHYSICAL SCIENCE (FW 2012/2013)
Additional problem for Oct. 2
A ball is thrown from the ground of planet Exidor at t = 0 s, and it follows a parabolic
trajectory. The balls velocity vector at t = 1.0 s is v(t = 1.0 s)= (2.0 + 2.0) m/s. At
t = 2
Ch. 15.4 The Electric Field
Faraday developed an
approach to discussing
An electric field is said to
exist in the region of
space around a charged
When another charged
object enters this
Ch. 18.3 Resistors in Parallel
Resistors in Parallel
The potential difference across each resistor is the
same because each is connected directly across the
The current, I, that enters a point of junction must b
Ch. 18.7 Electrical Safety
Electric shock can result in fatal burns.
Electric shock can cause the muscles of vital
organs (such as the heart) to malfunction.
The degree of damage depends on
The magnitude of the
Ch. 18.5 RC Circuits
When a direct current circuit
contains capacitors and
resistors, the current will
vary with time.
When the circuit is
completed, the capacitor
starts to charge.
The capacitor continues to
Ch. 17.1 Electric Current
Practical applications were
based on static electricity.
A steady source of electric
current allowed scientists to
learn how to control the
flow of electric charges in
The battery or vo
Ch. 18.6 Household Circuits
The utility company distributes
electric power to individual
houses with a pair of wires.
Electrical devices in the house
are connected in parallel with
The potential di
Ch. 18.4 Kirchhoffs Rules and
Complex DC Circuits
There are ways in which resistors can be
connected so that
Ch. 18.8 Conduction of Electrical Signals by
(additional information, not included to exams)
Electrical Signals in Neurons
Specialized cells in the body, called neurons, form
a complex network that receives, processes, and
Ch. 18.2 Resistors in Series
Resistors in Series
When two or more resistors are connected
end-to-end, they are said to be in series.
The current is the same in all resistors because
any charge that flows through one resistor
Ch. 18.1 Sources of emf
Electric circuits control the flow of electricity and the
energy associated with it.
Circuits are used in many applications.
Kirchhoffs Rules will simplify the analysis of simple
Ch. 16.6 Capacitance
Cross-section of an idealized
Electric field vector
contributions sum together
in between the plates.
Outside, E = 0.
charge density (charge
per unit area).
0 = 8.85x10-1
Ch. 17.6 Electrical Energy and Power.
Electric Current (Ch.17.1)
The direction of the current is the
direction positive charge would flow.
This is known as conventional
In a common conductor, such
as copper, th
Ch. 17.2 A Microscopic View: Current
and Drift Speed
Current and Drift Speed
Charged particles move
through a conductor of
cross-sectional area A
with a speed vd.
n is the number of
charge carriers per unit
n A x is the t
Ch. 16.9 Energy Stored in a Charged
Work to Move Charge in a Capacitor
Capacitors store energy. This energy is the same
as the work required to move charge onto plates.
If the plates are at the same potential: little wor
Ch. 17.4 Resistance, Resistivity, and
Georg Simon Ohm
High school teacher in
professor in Munich
concept of resistance
between current and
Ch. 16.7 The Parallel-Plate Capacitor
Parallel-Plate Capacitor, Example
The capacitor consists of two
Each has area A.
They are separated by a
The plates carry equal and
Ch. 17.3 Current and Voltage
Measurements in Circuits
A circuit is a closed path of some sort around
which current circulates.
A circuit diagram can be used to represent
Quantities of interest are generally
Ch. 16.8 Combinations of Capacitors
Capacitors in Parallel
When connected in parallel,
the left plates are connected
to the positive terminal of the
battery, so left plates are at
the same potential.
The same way, the right plates
Ch. 19.3 Magnetic Fields
When a charged particle is moving through a
magnetic field, a magnetic force acts on it.
This force has a maximum value when the charge
moves perpendicularly to the magnetic field lines.
Ch. 24.1 Conditions for Interference
Light waves interfere with each other much
like mechanical waves do.
All interference associated with light waves
arises when the electromagnetic fields that
constitute the individ
Ch. 22.7 Total Internal Reflection
Total Internal Reflection
Total internal reflection can
occur when light attempts to
move from a medium with a
higher index of refraction to
one with a lower index of
Ray 5 shows inte
Ch. 24.3 Change of Phase due to
Phase Changes Due To Reflection
An electromagnetic wave undergoes a phase change of 180
upon reflection from a medium of higher index of refraction
than the one in which it was traveling.
Name: Student Number:
1. (3 marks) Write down Newtons three laWS. 2. (4 marks) Geosynchronous Orbit
a) Find the height above the Earths surface for orbiting satellite to have a period of 24
hours. ME,1h : 6 x 102 kg, Rm = 6,400 km
We know that a net force applied to a body gives that
body an acceleration. But what does it take to give a
body an angular acceleration?
The physical quantity that make things turn is called
torque. The net torque acting on a rigid body determines
Process switching in UNIX
each process has a kernel stack which is accessible only to
the kernel but is part of the process image
each process has a page table which maps both its memory
image and the kernel memory image
when switching mode from user t
1. Induction Experiments
When there is a change in magnetic field, there will be a
2-3.Faradays Law & Lenzs
B B dA
Faradays law of induction