Electric Theory

Question 1

Define electricity

Answer 1

 Electricity is the passage of electrons between two
points.
 This normally occurs through a metal wire connecting
the two points & is called a current.
 Electricity can also pass through suitable aqueous
solutions, the electrical charge is then carried by ions.
 When a given electron flow is passed at a constant rate,
it is measured in amperes.
 The driving force causing current to flow is the potential
difference between two points & is measured in volts.

Question 2

Explain corrosion in reference to electrical theory

Answer 2

 When corrosion is studied, confusion arises because of
an historical accident that resulted in producing, what is
now called, Conventional Current.
 Electron flow is exactly opposite to conventional current.
 This is what causes the confusion as studies in corrosion
so often involve discussion on electron or ion flow.
 To avoid such problems, for the rest of this discussion
on corrosion only electron flow will be considered.

Electron flow is from anode to cathode