electricity Flashcards
(16 cards)
required practicle resistance in a wire variable
independant-length of wire
dependant-resistance
control-type metal,diameter of wire
required practicle series paralell circuit resistors variables
independant- series or pannel
dependant- resistance
control-number of resistors type of power source
required practicle relationship in circuit variables
independant-difference/volts
dependant-current
control-number of components e.g filament bulb
charge equation
q=It
potential difference equation
V=IR
CHARGE
electric current is the flow of electric charge it only flows when cirucuitis complete charge is the current flowing past a point in a given timee charge is measured in coulombs
calculating charge
- charge flow=current X time Q+It
- potential difference= current X resistance V=I X R
resistance equation
Voltage=current X resistance V=IR
current
the flow of electrical charge
potential differebce ( voltage)
the push of electrical charge
resistance
slows down flow of electricity
what happebns when adding reisrance
it lowers the resistance
live wire
RED provides the potential diference from the mains
neutral wire
GREEN&BLUE completes the circuit
earth wire
GREEN protection, stops the appliance from becoming live carries current if their is a fault touching the live wire can cause current to flow through your body resulting in an electric shock
energy transfered equation
=power X time