2.1. ELECTRIC FIELDS
2.1
I.
21
Electric Fields
Introduction
Coulombs law provides us a framework with which to calculate the net electric force on a test charge from
a source charge. This can be done for an arbitrary number of source charges.
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1.1. ARCHIMEDES PRINCIPLE
1.1
I.
7
Archimedes Principle
Introduction
Archimedes principle states that an object submerged in a uid experiences a buoyant force that is equal
to the weight of the displaced uid. In equation form, the buoyant force is then:
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PHYSICS 222
Homework #7 Solutions
27.C1) Assume R1 > R2 in gure below.
(a) Is the potential dierence across R2 more than, less than, or equal to that across R1 ?
In the rst circuit (a), the these two resistors are in parallel. Parallel elements always hav
1.2. TORRICELLIS THEOREM
1.2
I.
11
Torricellis Theorem
Introduction
Evangelista Torricelli was an Italian physicist who invented the mercury barometer, rst described the cause
of wind, and determined the velocity of the outgoing ow from a tank containing
2.3. OHMS LAW AND SIMPLE CIRCUITS
2.3
I.
37
Ohms Law and Simple Circuits
Introduction
As you saw in the last lab, Ohms law can be used in electrical circuits to determine the resistance of a
circuit element if you know the current passing through and volt
2.4. MAGNETIC FORCES
2.4
I.
43
Magnetic Forces
Introduction
Magnetic elds can exert a force on a charge, but unlike the electric eld case, the charge must be moving
and part of the charges motion must be perpendicular to the eld. This results in a force w
2.2. OHMS LAW AND SIMPLE CIRCUITS
2.2
I.
29
Ohms Law and Simple Circuits
Introduction
Ohms law describes the relationship between the conductivity, , or its inverse the resistivity, and the
electric eld inside the conductor which causes current ow. This c
1.3. CALORIMETRY
1.3
I.
17
Calorimetry
Introduction
A calorimeter is a device that attempts to mimic the ideal system you have used as a model in class and on
homework. In this idealized system, the only exchange of heat is inside the calorimeter and it i