Question

The physical quantity which having unit ohm meter
(A) Specific riesistance
(c) Conductance
(D) Current
at density
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Answer 1

The physical quantity which has unit ohm metre is specific resistance.

• Specific resistance is referred to as the resistance offered by a unit length and cross sectional area of a wire when a given voltage is applied to it.

• It can be represented by the given formula:

⍴= RA/L, where ⍴ is thd specific resistance, R is the resistance, A is the cross-sectional area and L is the length of the wire.

• So, for finding its unit, we can simply use the units of the components and simplify:

SI unit of R is ohm, L is metre, and A is metre^2

So, unit for ⍴=[ (Unit for R)(Unit for A)]/ Unit for L

So, unit for ⍴=[ (ohm)( metre^2)]/ metre

So, unit for ⍴= ohm-metre.