conduction in metals

Question 1

what does a solid conductor need

Answer 1

free, delocalized electrons which can leave atoms and create a movement of charge = current

Question 2

metallic structure

Answer 2

regular lattice of metal atoms
bonded through sharing electrons
outer electrons not needed for bonding = delocalised electrons

Question 3

free electrons move randomly

Answer 3

colliding with each other and atoms

Question 4

when no emf, overall charge remains

Answer 4

stationary

Question 5

if emf applied across the metal

Answer 5

electric field will push the electrons towards pos terminal

Question 6

the slow overall movement of electrons

Answer 6

drift velocity

Question 7

random thermal motion of free electrons is

Answer 7

always happening and really fast
only when emf is applied the electrons drift towards pos teminal

Question 8

properties of conductor that affects current

Answer 8

charge carrier density (n)
cross sectional area (A)

Question 9

properties of charge carriers (usually electrons - not always)

Answer 9

mean drift velocity (V)
charge of each charge carrier (e/q)

Question 10

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