PPT-Physics 2102 Electric fields

Gauss law Physics 2102 Gabriela Gonz á lez Carl Friedrich Gauss 17771855 Q r l QL r l Q2R q q r R q l Q2 p R r q r s Q p R 2 Electric field lines and forces. 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 Capacitors . Physics 2102. Gabriela Gonz. á. lez. Capacitors and Capacitance. Capacitor: any two conductors, one with charge +. Q. , other with charge -. Q. +Q. -Q. Uses: storing and releasing electric charge/energy. . 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. Gauss. ’ law. Physics 2102. Gabriela Gonz. á. lez. Carl Friedrich Gauss . 1777-1855. Electric Flux. Electric Flux . A . surface. integral!. CLOSED. surfaces: . define the vector dA as pointing . 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. Magnetic fields . Physics 2102. Gabriela Gonz. á. lez. Question. Two charged ions A and B traveling with a constant velocity . v. . enter a box in which there is a . uniform. magnetic field directed out of the page. The subsequent paths are as shown. What can you conclude?. 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. . Physics 2102. Gabriela Gonz. á. lez. The Biot-Savart Law. Quantitative rule for computing the magnetic field from any electric current. Choose a differential element of wire of length . dL. and carrying a current . 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. Gabriela Gonz. á. lez. Physics 2102 . Electric potential energy, . electric potential. Electric potential energy. of a system = . = . -. work (against electrostatic forces) needed to needed to build the system . Gabriela Gonz. á. lez. Physics 2102 . Electric Potential on Perpendicular Bisector of Dipole. You bring a charge of -3C from infinity to a point P on the perpendicular bisector of a dipole as shown.. . 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. Continuous charge distributions: line of charge. Visualizing the field: lines of force. Electron moving in a field. Electric dipoles. Superposition. The . total electric force . 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. .