Stuff im getting wrong 2

Question 1

define binding energy

Answer 1

energy required to separate nucleus into individual nucleons

Question 2

binding energy/mass defect eq?

Answer 2

mass of nucleons - mass of nucleus

Question 3

function of core?
function of secondary coil?

Answer 3

function of core - provides greater linkage/ increases magnetic flux linkage

function of secondary coil - has CHANGING/VARYING magnetic flux passing through , producing an induced emf/inducing an emf that is determined by the number of turns in the secondary coil

Question 4

how laminated core increases efficiency?

Answer 4

-laminations made from insulator/high resistivity material –> redcues eddy currents
-thin laminations –> so smaller emfs are induced in core
-thin laminations –> so resistance is high causing low eddy currents.

Question 5

problem w having voltage too high in national grid?

Answer 5

if voltage too high this will create major insulation difficulties

Question 6

CRAZYYYYY!!!!
mass of atom(s?) =

Answer 6

mass of atom(s?) = mr / Na

Question 7

why number of collisions needed to reduce Ek to that of thermal neutron depends on nucleon number of moderator atoms?

Answer 7

-more Ek lost when mass of atom closer to mass of neutron
-so as nucleon number increases more collisions are required.