# Shared Flashcard Set

## Details

Electricity (A Level)
Key terms with definitions.
18
Physics
Not Applicable
04/18/2017

Term
 Work Done
Definition
 Force x Distance
Term
 Power
Definition
 Energy transfer over a time period.
Term
 Ohms Law
Definition
 Current is proportional to Voltage(potential difference).
Term
 Critical temperature
Definition
 The temperature of a substance within its critical state.
Term
 Superconductivity
Definition
 Property of zero electrical resistance at a very low absolute temperature.
Term
 Resistivity
Definition
 Electrical resistivity is an intrinsic property that qualifies how strong a material opposes the flow of electrical current.
Term
 Thermistor
Definition
 An electrical resistor whose resistance is greatly reduced by heating.
Term
 Diode
Definition
 A semiconductor device with two thermals, typically allowing the flow of current in one direction only.orA thermionic valve having two electrodes (anode and cathode).
Term
 Series
Definition
 -A closed circuit in which the current flows one path.-Current is the same throughout.-If one thing breaks than the circuit is broken.
Term
 Parallel
Definition
 -A open circuit in which the current is divided into two or more paths.-Current is shared.-Conserved current.-If one thing breaks the circuit is not broken.
Term
 Voltage
Definition
 A measurement of the difference in electrical potential between two points in the circuit.Volts (V)
Term
 Resistance
Definition
 A Materials opposition to the flow of electrical current.Ohms
Term
 Induced EMF
Definition
 A way to induce voltage (emf), usually by making a charge in the magnetic environment of a coil of wire.This charge can be made by changing the magnetic field strength.
Term
 EMF
Definition
 -Short for Electromagnetic Force.-The energy per unit charge that is converted reversibly from energy to electrical energy in a battery.
Term
 Internal Resistance
Definition
 The resistance within a battery or voltage source.This causes a drop in source voltage (when there is a current).
Term
 Potential Divider
Definition
 A number of resistors in a series, provided with a tap to make available a fixed or variable fraction, of the applied voltage.
Term
 Charge
Definition
 The quality of electricity, traveling through a circuit.Coulombs (C)
Term
 Current
Definition
 The timed rate of flow of electric charge, in the direction of positive moving charge.Amps (A)
Supporting users have an ad free experience!