electric potential energy
... Electrical potential energy is the energy contained in a configuration of charges. Like all potential energies, when it goes up the configuration is less stable; when it goes down, the configuration is more stable. ...
... Electrical potential energy is the energy contained in a configuration of charges. Like all potential energies, when it goes up the configuration is less stable; when it goes down, the configuration is more stable. ...
PHY 113, Summer 2007
... HW 7 – due Tuesday, July 31 in class 1. Given a 7.4 pF air-filled capacitor, you are asked to convert it to a capacitor that can store up to 7.4 J with a maximum potential difference of 652 V. What is the dielectric constant of the dielectric you need to use to fill the gap in the capacitor? 2. Two ...
... HW 7 – due Tuesday, July 31 in class 1. Given a 7.4 pF air-filled capacitor, you are asked to convert it to a capacitor that can store up to 7.4 J with a maximum potential difference of 652 V. What is the dielectric constant of the dielectric you need to use to fill the gap in the capacitor? 2. Two ...
Finding the net electric field on the perpendicular bisector of the line
... where q represents a quantity of positive charge. This enables us to decide on the directions for the E-field vectors. The two vectors extend from the point P where the net field is to be found since the electric force on a positive test charge at P would be away from either charge. The distance fro ...
... where q represents a quantity of positive charge. This enables us to decide on the directions for the E-field vectors. The two vectors extend from the point P where the net field is to be found since the electric force on a positive test charge at P would be away from either charge. The distance fro ...
Section 17.3 - CPO Science
... 2. One or more fixed magnets around the rotor. 3. A commutator that switches the direction of current to keep the rotor spinning. ...
... 2. One or more fixed magnets around the rotor. 3. A commutator that switches the direction of current to keep the rotor spinning. ...
Electric current
An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in a plasma.The SI unit for measuring an electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is measured using a device called an ammeter.Electric currents cause Joule heating, which creates light in incandescent light bulbs. They also create magnetic fields, which are used in motors, inductors and generators.The particles that carry the charge in an electric current are called charge carriers. In metals, one or more electrons from each atom are loosely bound to the atom, and can move freely about within the metal. These conduction electrons are the charge carriers in metal conductors.