4.1 - Charge and Current Flashcards
1
Q
What is a Coulomb?
A
The quantity of charge that passes a fixed point in one second
2
Q
What is Electric Current?
A
A flow of charge. Measured in amperes (Amps or A)
3
Q
What is Conventional Current?
A
A model used to describe the movement of charge in a circuit from the positive terminal of a cell to the negative terminal
4
Q
What is Electron Flow?
A
The fact that charge carriers (electrons) flow from the negative terminal to the positive terminal
5
Q
What is Kirchoff’s First Law?
A
The sum of currents entering any junction is always equal to the sum of the currents leaving the junction
6
Q
What is each letter in I=nAve?
A
I = Current n = the number of free electrons per unit volume A = cross sectional area of the wire e = the charge on the electron (1.602 x 10^-19C) v = the mean drift velocity of the electrons
7
Q
What is 1 Coulomb in electrons?
A
1 coulomb is the amount of charge on 6.25x10^18 electrons or 1 Amp second
