Specific Conductivity (K): It is the conductivity of 1
cubic-centimetre of a solution.

Equivalent Conductivity: It is the conductivity of a
solution containing 1 equivalent of the solute between two parallel
electrodes separated by 1 cm.

l_{eq} =

1000K

S cm^{2} equivalent ^{-1}

N

Molar Conductivity: It is the conductivity of a
solution containing 1 mole of a solute between two parallel electrodes
separated by 1 cm.

l_{m} =

1000K

S cm^{2} mol ^{-1}

N

Kohlrausch'sLaw : It states that the molar
conductivity at infinite dilution of an electrolyte is equal to the sum
of the molar conductivities at infinite dilution of the ions produced by
the electrolyte.

Ohm's Law: It states that the strength
of an electric current is directly proportional to the potential
difference and inversely proportional to the resistance of the circuit.

V = IR

V is potential difference in
volts
I is current in ampere
R is resistance in ohms

Degree of Ionisation: It is the extent of dissociation of an
electrolyte.

Strong Electrolyte: An electrolyte that ionises completely in solution is called a strong
electrolyte.

Weak Electrolyte: An electrolyte that ionises partially in solution is called a weak
electrolyte.

Cell Constant: It is the ratio l/A
for a conductivity cell where l is the distance between the
electrodes and A is the area of the electrode.

Cell constant
=

l

= K × R

A

=

Specific conductivity × Resistance

Battery: It is a combination of two
or more galvanic cells electrically connected to work together to
produce electric energy.