Resistance is the property of a material by
virtue of which it opposes the electrical
current.
Here
i will write the definition.
It is the opposition offered by a material
to the flow of electrical current
.The unit of this resistance can be Ohm or
Kilo Ohm or Mega Ohm.
As far as the physical
parameters are concerned resistance depends
on following parameters.
where l is nothing but a
length of a conductor 
whose unit is meter, where A is area of cross
section of a conductor (unit
of the area is meter square),Rho is specific
resistance or resistivity of a material, whose
unit is
ohm meter.
As far as the electrical parameters are concerned
which are nothing but voltage and
current, Resistance is given by the Ohm&#39;s
law and the equation governs is equal to IR
or R is
equal to V by I.
So, by Ohm’s law resistance can be calculated
by knowing the voltage and
current flowing through the conductor, which
is given by R equal to V by I.
Here we have seen
the basic electrical property, which is a
resistance, as for as the physical parameters
are
concerned resistance is given by (Rho*l)/A
and as far as the electrical parameters which
are
nothing but a voltage and current are concerned
resistor is given V/ I.
So the next lecture we will
see some more important parameters of this
resistor and most importantly the connections
of
this resistance.
Thank you
