define the term ohm meter

Asked by singhchander260 | 18th Nov, 2020, 08:03: PM

Expert Answer:

Ohm-meter is the unit of resistivity
 
Resistance R of conductor is directly proportional to length L of conductor ,  R begin mathsize 14px style proportional to end style L
Resistance R of conductor is inversely proportional to crosssection area A of conductor ,  R begin mathsize 14px style proportional to end style 1/A
 
Hence we get Resistance R = ρ × ( L / A ) 
 
where constant ρ is resistivity of material of  conductor
 
Unit of R = ohm ( Ω )
 
since unit of lenth is meter and that of area is square meter , we get unit of resistance as ohm-meter

Answered by Thiyagarajan K | 19th Nov, 2020, 11:17: AM