Unit 2.1 Physics

?
The law of conservation of charge
The net charge in a system remains constant (provided charges can't enter or leave)
1 of 8
Electric current (symbol and unit)
Symbol: I Unit: Ampere (A) = Cs^-1
2 of 8
The electric current through a conductor is
Rate of flow of charge (the charge passing per unit time through a cross-section of the conductor)
3 of 8
I=nAve
I=current; n=number of free electrons per unit volume; A=; v=drift velocity of free electrons in wire; e=electron charge
4 of 8
The SI unit of charge
coulomb (C)
5 of 8
An electron's charge (-e)
e=1.6x10^-19 C
6 of 8
Electric current (+equation)
The rate of flow of electric charge (I= change in Q / change in t)
7 of 8
Efficiency of a system
%Efficiency = 100 x useful work out / work put in
8 of 8

Other cards in this set

Card 2

Front

Symbol: I Unit: Ampere (A) = Cs^-1

Back

Electric current (symbol and unit)

Card 3

Front

Rate of flow of charge (the charge passing per unit time through a cross-section of the conductor)

Back

Preview of the back of card 3

Card 4

Front

I=current; n=number of free electrons per unit volume; A=; v=drift velocity of free electrons in wire; e=electron charge

Back

Preview of the back of card 4

Card 5

Front

coulomb (C)

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Conduction of electricity resources »