Even though no one has been able to link gravitational and electric fields together, we will see how they follow remarkably similar patterns. Gravitational fields are of great concern when dealing with orbits, rocketry and interplanetary probes. Electric fields are less familiar, but have many practical applications in devices that we use every day. In this unit we will learn the fundamentals of how these fields work.
It is very important that you read the pages in the textbook that go along with the lessons as some of the topics are confusing.
Lesson  Topic  Text (Nelson) 
Homework & Resources  Text (Martindale) 
1. 
Force fields, Gravitational Energy 
274277 
Excellent PowerPoint summary of physics p293#8 no,11 

2. 
Orbits, orbital speed, escape velocity, 
145151 278284 288294 
p300 #5,8,10a,17 

3. 
Fg and g as vectors. Work period 

4. 
Electric Force (Fq). Coulomb's Law  read §7.1  7.3 

5. 
Quiz  gravity Electric Fields (java applets), field lines, Sample calculations Summary of electrostatics 
337348  See: Electric
Field diagrams and Electric Fields Applet Read electric_fields.pdf worksheet based on applet 

6. 
Electric Fields (cont.) (perpendicular to conductors, shielding, point discharges) 
p343 #1a,4; also 4 questions at end of lesson Assignment #2 

7. 
Electric Potential Energy, 
349  
8. 
Electric Potential and Voltage Equipotential Lines Millikan Experiment (p360364) 
350355  PseudoLab: p374 part 2  
9. 
Quiz  Electric fields and equations Equipotential PreLab 
Do prelab  
10. 
Equipotential LAB  Lab writeup Read G E M fields comparison 

11. 
Omit this Capacitance  ** not written up yet. May take a couple of days. 

...  
12. 
Review  
13. 
Unit Test 
Assignment #1: p 300 #5,8,10,17
Assignment #2: Find 3 uses of electric fields in technology, i.e. 3
devices that use electric fields.
– no, perhaps, just find one, write it on a list so that no one else can
use it. Write up a summary (one or two pages) with a diagram (mandatory) explaining
how it works. Hand out to class, and explain verbally how it works. I’ll
add these to the test (not necessarily relying solely on the handouts, but also
on any missed information as to how the device works ? you need to do a good
job).
define and describe the concepts (quantities) and
units related to fields: potential energy, gravitational field intensity,
electric field, magnetic field, magnetic induction
state and apply Coulomb's
Law and Newton's Law of Universal Gravitation (in static cases)
determine the strength of the gravitational field
at some point outside a spherically symmetric mass
deterime the velocity, centripetal acceleration
and period of orbit for an object in a circular orbit
for a general orbit, use conservation of angular
momentum to determine the velocity and radial distance at any point in
the orbit (not done 2003)
apply conservation of angular momentum and conservation
of energy to relate the speeds at the two extremes of an elliptical orbit
(not done 2003)
state Kepler's three laws of planetary motion
Electric fields and forces:
define electric field in
terms of the force on a point charge
calculate the magnitude and direction of a force
on a + or  charge placed in a specified field
given a diagram on which
the electric field is represented by flux lines, determine the direction
of the field at a given point, identify locations where the field is strong
and weak, and identify where positive or negative chrages must be present
analyse (??) the motion of a particle of specified
charge and mass in a uniform electric field
describe the electric field produced by a point
charge
analyse, illustrate with field and vector diagrams
(one diagram or two?) the electric field and the forces produced
by a single point charge, two point charges, parallel plates
determine the electric force that acts between
specified point charges
use vector addition to determine the electric
field produced by two or more point charges
compare the properties of G, E and M fields,
illustrating the direction of the fields ...
calculate the electric force needed to balance
gravitational force (Millikan's oil drop experiment)
Electric potential:
calculate the electrical work done on a charge
to move it through a specified potential difference
given a sketch of equipotential lines for a charge
configuration, determine the direction and approximate magnitude of the
electric field at various locations
apply conservation of energy to determine the
speed of a charged particle that has been accelerated through a specified
potential difference
calculate the potential difference between two
points in a uniform electric field and state which is at the higher potential
determine the electric potential in the vicinity
of one or more poitn chrages
apply the concept of electric potential energy;
compare it to gravitational potential energy
Conductors:
describe and explain the
electric field that exists inside and on the surface of a charged conductor
(e.g. a wire or coaxial cable)
explain why a conductor must always be an equipotential;
apply this principle to analyze what happens when conductors are brought
in contact
determine the direction of the forceon a chargedparticle
brought near an uncharged or grounded conductor
describe the process of charging by induction
Capacitors:
define capacitance; relate voltage, stored charge,
and stored energy for a capacitor
using parallel plade capacitors: describe the
electric field inside the capacitor, relate field strength to potential
difference and plate separation
determine how changes in dimension affect the
value of the capacitance
calculate equivalent capacitance of a series
or parallel combination
describe how stored charge is divided between
two capacitors connected in parallel
determine the ratio of voltages for two capacitors
connected in series
calculate voltage or stored charge for a DC
RC circuit at equilibrium
using RC circuits, determine voltages and currents
immediately after a switch has been closed
Magnetic fields:
determine the net force, and subsequent motion,
of particles in some sort of field, either from experiment or computer
simulation
Legend:
Ministry of Education requirement
AP Physics requirement
Teacher's extra requirement