Unit 2

Question 1

Define electric current

Answer 1

is the time rate of flow of net charge
I=q/t
SI Unit: c/s=A

Question 2

Define electric potential difference

Answer 2

is the charge in electric potential energy divided by charge.
Delta V=DeltaV sub E/q
SI unit: J/c=V

Question 3

Define Electron Volt (eV)

Answer 3

the energy acquired by an electron (or proton) in moving through a potential difference of one volt.

Question 4

Define capacitance

Answer 4

is a measure of the capacitors ability to store charge and electric potential energy
C=Q/V
SI unit: Coulomn/Volt= Farad

Question 5

Define Electromotive Force (EMF)

Answer 5

It is the influence that makes current flow from low to high potential within a source.
V=E=Ir

Question 6

Define Kilowatt-Hour

Answer 6

is the amount of energy used in one hour while operating at a constant power of 1 kw.
1kwh= 3.6*10^6 J