electricity and magnetism lecture notes ppt

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ELECTRICITY & MAGNETISM Lecture notes for Phys 121

These notes are intended as an addition to the lectures given in class They are NOT designed to replace the actual lectures Some of the notes will contain less information then in the actual lecture and some will have extra info Not all formulas which will be needed for exams are contained in these notes Also these notes will NOT contain any

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Electricity Magnetism and Optics

A lecture note style textbook series intended to support the teaching of introductory physics with calculus at a level suitable for Duke undergraduates • Classical Electrodynamics A lecture note style textbook intended to support the second semester (primarily the dynamical portion little statics covered) of a two semester course of graduate

How does Gauss's law relate charges and electric fields?
Gauss's law relates charges and electric fields in a subtle and powerful way, but before we can write down Gauss's Law, we need to introduce a new concept: the electric flux through a surface. lines. We say that there is some electric flux through this surface.
What will I learn in Week 2 of continuous charge & Gauss's law?
Week 2: Continuous Charge and Gauss’s Law135 to other members of their study group) and will be able to handle minor variations that make the problem not quite identical to the lecture/text/homework it is based on. Just something to keep in mind while working on these problems in groups.
Which physics textbooks are suitable for Duke students?
Books by Robert G. Brown Physics Textbooks •Introductory Physics I and II A lecture note style textbook series intended to support the teaching of introductory physics, with calculus, at a level suitable for Duke undergraduates. •Classical Electrodynamics

Abstract

These notes are intended as an addition to the lectures given in class. They are NOT designed to replace the actual lectures. Some of the notes will contain less information then in the actual lecture, and some will have extra info. Not all formulas which will be needed for exams are contained in these notes. Also, these notes will NOT contain any

I. Introduction

Vectors Single vector Two vectors: addition Two vectors: scalar (dot) product Two vectors: vector product Advanced: Fields Representation of a field; field lines Properties of field lines and related definitions web.njit.edu

II. Electric Charge

Notations and units Superposition of charges Quantization of charge Charge conservation The Coulomb’s Law Superposition of forces Reaction of a charge to electrostatic and other forces web.njit.edu

III. Electric field

Field due to a point charge Definition and units Vector Fields and Field Lines Field due to several charges Definition and force on a charge in a field Superposition of fields Electrostatic Field Lines (EFL) Field lines due to a dipole Continuos charge distribution web.njit.edu

V. Electrostatic potential (EP)

Definitions, units, etc. Work and energy in electrostatic field Conservative forces Interaction of two charges Potential due to a point charge Relation to electric field Potential from field Field from potential Conductors VI. Properties of a conductor in electrostatics web.njit.edu

VIII. Current

Definitions and units Resistance of a wire Relation to field Power Single resistor Simple connections Series and parallel connections Ampmeter and voltmeter Branching of current in parallel connections Microscopic picture of conductivity Dielectric I. Liquids (electrolytes) web.njit.edu

k j

Suppose now a system of coordinates is introduced with unit vectors ˆ i, j ˆ and ˆ k pointing in the x, y and z directions, respectively. First of all, if ˆ i, ˆ j, k ˆ are written ”in a ring”, the cross product of any two of them equals in clockwise direction the third one, i.e. ˆ i × ˆ ˆ ˆ ˆ ˆ j ˆ = k , j ˆ ˆ × k = i , k × i = j etc. web.njit.edu

VB − VA = − Z E · ds (37)

A Note the minus sign - the potential always decreases in the direction of the field. (Analogy with water runing downhill). Simplest example: If field is constant, web.njit.edu

VB − VA = −E · ∆r

∆r being the vector from A to B. Along the constant field web.njit.edu

C = Q/V

(40) In most cases it does not depend on Q or V , but is determined solely by the geometry of the conductor. Units [C] = C/V = F (farads) Capacitors. We will see that the capacitance of a single conductor is usually very small. A simple capacitor is a combination of two conductors, one charged with a charge +Q and the other −Q. The same definition

V (r) = kQ/r + const

. The const, however, does not matter as long as one need the difference web.njit.edu

E1 − I3R3 = 0

(Note, always try to select a loop with a single resistor, even if with many batteries). Junction rule: web.njit.edu

I1 + I2 = I3

E. RC circuits Loop equation. Treat capacitor as a ”battery” with ”+” on left; assume counterclockwise current, loop - CCW, from b: web.njit.edu

Basic Electricity & Magnetism Lecture Part 1.mp4

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ELECTRICITY AND MAGNETISM - Encyclopedia of Life Support

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