Studied by 1 person
What is actual current flow?
Electrons flow from negative to positive
What is conventional current flow?
Electrons flow from positive to negative
What is voltage?
Energy per coulomb ( V= w/Q)
How many electrons are in one coulomb?
6×10^18
What is potential difference?
The work done per unit charge
What happens when a voltage is applied to a circuit?
Electrons are attracted to positive terminal
What are other terms used to describe delocalised electrons?
conduction electrons
Free electrons
What does relative charge mean?
Relative to the elementary charge (e)
proton = +1e
Electron = -1e
Neutron = 0e
What is the value of 1e charge?
1.6 × 10^-19
How do you work out the number of electrons using charge?
Number of electrons = total charge/ charge of electrons
What is the equation for net charge?
Q= (+-) ne
What are the 2 ways of making electrons flow?
increase heat (increases energy of particles)
Make one end of wire/ circuit positive and one negative (electrons will flow towards positive)
What is an electric current in metals?
A flow of electrons
What is the structure of a metal?
A regular crystal structure or lattice of positive ions surrounded by free electrons (delocalised/ conduction)
What must liquids be in order to be an electrolyte?
Molten
Aqueous
Ionic compound
What is an electrolyte?
A liquid that can carry a current
Note
Flashcard