simple electric circuit and ohms law Flashcards
what is the simple electric circuit consists of
- electric source
- conductor
- key switch
- ammeter
- voltmeter
- fixed resistance
- variable resistance Rheostat
use of electric sourse
source of electromotive force to male electric potential defference between the terminal of conductor
use of wire
to conduct electrical charges through the closed circuit
use of key switch
to switch on or off the circuit
use of ammeter
instrument connected in series to measure the elerctric current intensity through the circuit
the ammeter of high efficiency should have
low resistance
use of voltmeter
instrument connected in parallel between two points to measure the electric potential differennce between this point
use of fixed resistance
it is consumes the electric energy in form of thermal energy
use of Rheostat
to adjusit resissnce of the whole circuit to allow suitaple current to transfer
diff electric current intensity
Rule and unit
it is the quantity of electric charges passes a given cross section in one second
I=RxV
AMPERE
diff potential difference
rule and unit
it is the work done to transfer a unit of charge between these two points
V=IxR
diff ohms law
it is the current intensity in a conductor is directly proportional to the potential difference across its terminals at constant temperature
diff couloum
it is the quantity of electric charges when the electric chrges pasess in one sec
what meant by electric current intinsty = 5A
it is the quantity of electric charges pases in one sec through a closed circuit
what meant by the potential deffrence = 3 volt
the work done 3 joule to transfer a unit of charge 1 C between two terminal of conductor
what meant by e m f = 1.5 v
the work done 1.5 joule to transfer a unit of charge 1 C through the whole circuit ( inside and outside the circuit)
what meant by the work done to transfer an electric charge of 4 coulombs between two points in an electric circuit = 20 joule
the potential deffreance between two point is 5 volt
ohmic resistance of a conductor = 10 ohm
it means that this conductor allow passing current intensity 1 amp if the potential deffrence betweent two terminals is 10 volt
diff electro motive force
it is the total work done to transfer a unit of charge through whole circuit inside and out side the cell or it is potential difference betweent two poles of the cell at open circuit
diff ampere
it is the current intensity when electric charge of 1 coulomb passes in 1 sec
diff volt
it is potential difference between two points if the work of 1 joule is done to transfer a unit of charge 1 C between these two point
diff ohm
it is the resistance of conductor allows passing current intensity 1 amp if the potential difference betwwen two terminals is 1 volt
the voltmeter of high efficiency should have
high resistance
the ohmeter of high efficiency should be
low resistance
