Details Title: AS Physics - Electricity Description: G482 Elecricity Cards Total Flash Cards: 17 Created: 01/29/2009 07:38:59		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Physics Flashcards
Cards in this set: Term Charge of electron Definition 1.6x10^-19 Coulombs Term Ohm's Law Definition The current through a conductor is proportional to the applied P.D. provided physical constants such as temperature remain constant. Term Resistivity Definition rho = RA/l (l=length, R=resistance, A=cross-sectional area) Term kilowatt-hour Definition A power of 1000 watts for 3600s, therefore 3600000J. Term drift velocity Definition The average velocity of an electron as it travels through a conductor due to a P.D. Term Electric charge Definition Current x time (measured in Coulombs) Term LDR Definition Light Dependent resistor Term watt Definition unit of power 1w = 1 J/s Term e.m.f Definition energy transferred per unit charge when one form of energy is transferred into lectrical energy, measured in volts (V) Term resistance Definition property of a copmponent which regulates current passing through Term NTC thermistor Definition Component which drops in resistance with increasing temperature Term p.d. Definition electrical energy transferred per nit charge when electrical energy is converted into another form Term conventional current Definition model used to describe movement of charge in a circuit: + to - Term the Volt Definition When one coulomb of charge gains one Joule of energy, the accelerating potential difference is one Volt. Term Kirchoff II Definition The sum of the e.m.fs = sum of P.Ds (IxR) in a closed loop Term Kirchoff I Definition Sum of the currents entering and leaving a junction is zero. (Sum entering = sum leaving) Term Terminal P.D. Definition P.D. measured across the terminals of a cell using an ideal voltmeter.