Ch8 charge and electrons

Question 1

What is a current?

Answer 1

I = Q/t
Q = ne
current is the rate of flow of charge.

Question 2

Kirchoff first law

Answer 2

the sum of current entering a junction is equal to the sum of current exiting the junction.
this law shows that the charge is conserved.

Question 3

number density

Answer 3

n = N/V
number density is the number of charge carriers per unit volume

Question 4

mean drift velocity

Answer 4

I = AneV
n = number density
mean drift velocity is the mean velocity of charge carriers along the length of the conductor