Were learned about batteries (emf) and resistors, and Ohms Law.
We can put these concepts together to be able to understand what is
happening in a DC circuit.
Electric circuits are so
Jan 04, 2016
113 Petrie Science Building
3 Lecture hours per week, MWF 12:30pm 1:30pm CLH-L
1 Tutorial per week: F 8:30am- 9:30pm CLH-L
10 Lab session starting in W
w/ Integral calculus primer
With only a few charges, using the superposition principle to
find the total force is often easiest.
For more complex charge distributions, it can help to think in
terms of electri
Electric Potential Energy and
Describing a continuous charge distribution
Take a charge Q distributed along a thin rod with length L. Its
linear charge density in C/m is:
Let the x-axis be along the rod. A lengt
Electric Fields and Conductors
Test 1: Feb 1 conflicts with Math1014 test. I propose moving
the test date to one week later. Monday Feb 8th.
Because of this, I would want to move Test 2 to also be
Most of the circuits weve talked about so far were Direct
Current (DC) circuits. Meaning the power supply was a source
of constant emf.
An Alternating Current (AC) circuit is one in which
Last time we saw how resistors, capacitors and inductors behaved
when powered by an AC supply.
Capacitors has a frequency dependent reactance =
which is a
way of thinking about its resistance
Light is an electromagnetic wave, with a transverse Electric and
Magnetic field which oscillates in a sinusoidal manner.
Light travels at , the speed of light, when in vacuum, and some
smaller value when travelling thro
Recall that magnetic flux , , is a measure of the
number of field lines passing through a given surface.
Faradays Law of Induction told us that a changing
magnetic flux t
The Electric Force, Field
Electric Potential Energy, Electric Potential,
Capacitors, Resistors, DC Circuits, Kirchhoffs
Laws, RC Circuits
There is a physical property called charge.
Charges can be eithe
Weve learned about simple circuits. Emf, resistors,
capacitors. But circuits are comprised of multiple elementsresistors, capacitors, diodes, transistors, IC chips, batteries,
inductors, on so on.
The best place to start
We learned about the fundamentals of capacitors last timehow capacitance is related to physical size
how a dielectric can increase the capacitance
how much charge is stored on a plate of
A capacitor is a device used in a
variety of electric circuits.
The capacitance, , of a capacitor is
defined as the ratio of the
magnitude of the charge on either
conductor (plate) to the magnitude
of the potential d
Hall Effect & Force on CurrentCarrying Wire
The motion of charged particles in magnetic fields has been
The are many application and implications from this effect. A
particularly useful effect, and one which you will b
Induced emf and Magnetic Flux
Flux of a Field
Notice that when electric field lines and magnetic field lines
are drawn, that the magnitude (strength) of the field is given
by how close the field lines are to each other.
- closely packed lin
Of Loops and Solenoids
Origin of Magnetic Fields
Magnet fields are created by the motion of charges.
Either by the microscopic alignment of atoms and orbiting
electrons inside a material like a magnet,
Inductors and RL Circuits
The property of induction can be applied to circuits and
Imagine a coil of wire in a circuit with current flowing through
it will generate a magnetic field along its axis, and hence
Electric Forces and Fields
There is a property called charge, objects can be positively
or negatively charged (or neutral).
All charges in the universe either attract or repel all other
charges in the universe in accordance with Cou
A bit more Reflection
We can use the principles of Rays to understand what happens when
EM waves interact with object which are large compared to the
wavelength. As in visible light and object we use.