2.1 conduction of electricity

Question 1

electric current

Answer 1

the rate of flow of charge. Measured in amps, A = Cs^-1

Question 2

charge, current, and time

Answer 2

I = Q / t

Question 3

what does e represent

Answer 3

the charge on an electron
1.60x10^-19

Question 4

drift velocity

Answer 4

average v of the charge carries due to the applied electric current
has o be average cause they’re often moving randomly in all directions

Question 5

drift velocity derivtaion

Answer 5

1: volume of the cylindrical wire.
Volume=A×vt

2: number of free electrons in the wire.
Number of free electrons=n×Avt
where n = the number of free electrons per m3.

3: total charge.
Charge, Q=nAvt×e
where e is the charge of 1 electron (=1.6×10−19C).

Step 4: Calculate the current (I).
I=∆Q/∆t = nAvte / t ​= nAve