Αποτελέσματα Αναζήτησης
Voltage V is like the electric "pressure" at a point in space, and it's what pushes electric charges around. The voltage difference between two points can be calculated by: V = Ed. V = Voltage difference (V or J/C) E = Electric field strength (V/m) d = distance between points parallel to field (m)
Describe positive and negative electric charges; Use conservation of charge to calculate quantities of charge transferred between objects; Characterize materials as conductors or insulators based on their electrical properties; Describe electric polarization and charging by induction
Calculate the potential of a continuous charge distribution. Point charges, such as electrons, are among the fundamental building blocks of matter. Furthermore, spherical charge distributions (such as charge on a metal sphere) create external electric fields exactly like a point charge.
The electric field mediates the electric force between a source charge and a test charge. The electric field, like the electric force, obeys the superposition principle. The field is a vector; by definition, it points away from positive charges and toward negative charges.
Calculate electric potential and potential difference from potential energy and electric field. Describe systems in which the electron-volt is a useful unit. Apply conservation of energy to electric systems.
Calculate electric potential and potential difference from potential energy and electric field; Describe systems in which the electron-volt is a useful unit; Apply conservation of energy to electric systems
Describe how current is related to charge and time, and distinguish between direct current and alternating current; Define resistance and verbally describe Ohm’s law; Calculate current and solve problems involving Ohm’s law
