2 differences between resistance and resistivity ?

Asked by Rohith Kumar | 26th Apr, 2014, 07:14: PM

Expert Answer:

Resistance is the property of conductor by virtue of which it opposes the flow of electric current through it.
R = V/I
Here, R is the resistance, V is the potential difference and I is electric current
Its SI unit is ohm
 
 
Resistivity is the resistance offered by 1m length of wire of the material having area of cross section of 1 m2. It is also called the specific resistance of conductor.
ρ = R a / l
 
Here, ρ is the specific resistance, R is the resistance, a is the area of cross section and l is the length of the conductor.
Its SI unit is ohm-metre.
 

Answered by  | 26th Apr, 2014, 11:42: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.