# Shared Flashcard Set

## Details

IGCSE Physics Electricity
IGCSE Physics Electricity
27
Physics
01/26/2011

Term
 Electric charge
Definition
 The cause of electric fields and currents. Can be positive or negative
Term
 Electrical conductor
Definition
 A material which allows electric charge to flow
Term
 Electrical insulator
Definition
 A material which prevents the flow of electric charge
Term
 Earthing
Definition
 The connection of a conductor to the earth which allows electric charge to flow.
Term
 Electric field
Definition
 The space around an electric charge in which another charge wil feel a force
Term
 Electric current
Definition
 The flow of electric charge. From + to -
Term
 Current equation
Definition
 I = Q/t OR Q = It
Term
 Ampere
Definition
 The unit of electric current
Term
 Coulomb
Definition
 The unit of electric charge
Term
 Direct current (DC)
Definition
 Current which flows in the same direction all the time, such as from a battery.
Term
 Alternating current (AC)
Definition
 Current which constantly changes direction of flow eg from the mains.
Term
 Ammeter
Definition
 Instrument which measures electric current. Must be connected in series
Term
 Voltmeter
Definition
 Instrument which measures the voltage (PD) between two points. Must be connected in parallel
Term
 Series
Definition
 Components connected end to end in a chain
Term
 Parallel
Definition
 Components connected in a ladder formation
Term
 Current law (Kirchoff)
Definition
 The current flowing into any point in a circuit is equal to the current flowing out of it.
Term
 Joule
Definition
 Unit of energy
Term
 Watt
Definition
 Unit of power
Term
 Voltage (PD)
Definition
 The amount of energy transferred per unit charge passed
Term
 Voltage equation
Definition
 Voltage = Energy/ charge
Term
 Volt
Definition
 Unit of voltage/ PD
Term
 Resistance
Definition
 The amont that a component resists a current
Term
 Resistance equation
Definition
 R = V/IorV = IR
Term
 Ohm/ Ω
Definition
 Unit of resistance
Term
 Ohm's law
Definition
 The current through a metallic conductor is proportional to the voltage across its ends if the temperature and other conditions remain constant.
Term
 Electrical source
Definition
 Transfers other forms of energy into electrical
Term
 Component
Definition
 Transfers electrical energy into other forms
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