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CBSE Class 10 Answered

define the term ohm meter
Asked by singhchander260 | 18 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 | 19 Nov, 2020, 11:17: AM

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