Question

derive the relation R=p 1/A. give the unit of resistivity​

Answer 1

Answer:

here's the answer

Explanation:

SI unit of resistivity is ohm

Answer 2

Explanation:

Area of Cross Section: Resistance R is inversely proportional to the area of cross section (A) of the conductor. This means R will decrease with an increase in the area of conductor and vice versa. More area of conductor facilitates the flow of electric current through more area and thus, decreases the resistance. This is the cause that thick copper wire creates less resistance to the electric current.Thus, resistance (R) ∝ 1/Area of cross section of conductor (A)

R= ρA/L

S.I. unit of resistivity is ohm-meter (Ωm).