PPT-More Electric Fields Physics 2415 Lecture 3

Michael Fowler UVa Todays Topics Continuous charge distributions line of charge Visualizing the field lines of force Electron moving in a field Electric dipoles Superposition The total electric force . This will result in a linearly polarized plane wave travelling in the x direction at the speed of light and E x t E x t j B x t B x t k We will derive the wave equation from 0DZHOO57526V57347TXDWLRQV57347LQ57347IUHH57347VSDFH where I an In addition magnetic fields create a force only on moving charges The direction the magnetic field produced by a moving charge is perpendicular to the direction of motion The direction of the force due to a magnetic field is perpendicular to the dir Cyberworld. November. 2014. Sandrine Ammann. Marketing & Communications Officer. Agenda. Latest developments. Complex . queries. Search syntax. Field code. Examples. CLIR. “Wrap-up” example. Q&A session. Magnetic fields . Physics 2102. Gabriela Gonz. á. lez. L. Magnetic force on a wire. L. Note: If wire is not straight,. compute force on differential elements and integrate:. Example. By symmetry, F. : General . Physics II. Lecture . 1. Michael Fowler. Basic Outline. The course has three main . parts, . each about a . month: . Electrostatics. .. Magnetism and Magnetic Induction.. Electromagnetic Waves.. Electric fields are created by . electric charges. . Any object with a charge has an electric field around it. Opposite charges attract each other; like charges repel. An electric field is a region in which a charge experiences a force. . Gauss. ’ law. Physics 2102. Gabriela Gonz. á. lez. Carl Friedrich Gauss . 1777-1855. Q. r. l. =Q/L. r. l. =Q/2R. q. q. r. = R. q. l. =Q/2. p. R. r. q. r. s. . =Q/. p. R. 2. Electric field lines and forces. Chapter Summary 1. An electric field exists around any charged object. The field produces forces on other charged objects. . The electric field is the force per unit charge.. Creating and Measuring Electric Fields. . Electric Potential (Energy). Charges. The fundamental rule at the base of all electrical phenomena is that . like charges repel and opposite charges attract. An object that has unequal numbers of electrons and protons is . Michael Fowler, . UVa. Today’s Topics. Huygens’ principle and refraction. Snell’s law and applications. Dispersion. Total internal reflection. Huygens’ Principle. Newton’s contemporary Christian Huygens believed light to be a wave, and pictured its propagation as follows: at any instant, the wave front has reached a certain line or curve. From every point on this wave front, a . Lecture 1. Michael Fowler. Basic Outline. The course has three main parts, each about a month: . Electrostatics.. Magnetism and Magnetic Induction.. Electromagnetic Waves.. We’ll cover some other waves, and optical phenomena, in the last few lectures. We’ll also cover DC and AC circuits in the course.. Michael Fowler, UVa. Today’s Topics. Field lines and . equipotentials. Partial derivatives. Potential along a line from two charges. Electric breakdown of air. Potential Energies Just Add. Suppose you want to bring one charge . Michael Fowler, . UVa. Today’s Topics. Electric motors and galvanometers. Ratio of charge to mass for an electron. Hall Effect. Mass spectometry. Reviewing Essential Facts:. The force on an element of current in a wire in a magnetic field is:. Defining the Electric Field. Michael Faraday suggested the idea of a force field to explain how the electric force can act at a distance.. An . electric field . is a property of the space around a charged object that exerts forces on other charged objects. .