Physics-Electricity.txt

 .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } Outline electrical conduction. Conduction is due to the movement of the free electrons (transferring charge around a circuit);metals are a good electrical conductor with large numbers of free electrons;insulators are bad conductors with few/no free electrons; Define electromotive force (emf) The work done per unit charge in moving a quantity of charge completely around a circuit / the power delivered per unit current / work done per unit charge made available by the source; Describe how the resistance of a wire leads to a greater dissipation of power. The resistance of a conductor increases with increasing temperature;increased power (dissipation) leads to a higher temperature in the resistor / resistor heating up; Define ideal ammeter and ideal voltmeter Ideal ammeter has zero resistance;ideal voltmeter has infinite resistance; Define electronvolt The energy gained by an electron when accelerated through an electric field with a potential difference of 1V;1.6x10^-19J; The definition of the ampere refers to The force between parallel current-carrying conductors; State Ohm's Law The voltage is (directly) proportional to current / the ratio of potential difference to current is a constant called resistance / the resistance of a conductor is constant provided its temperature isconstant; Describe a potential divider. Consists of two resistors in series or a potentiometer;whereby the voltage traveling Authorrichardive ID217790 Card SetPhysics-Electricity.txt Descriptionpojaedpgojav Updated2013-05-05T07:57:18Z Show Answers