contestada

Consider a wire that has resistance r, length l and the cross-sectional area
a. the correct expression for the resistivity of that wire is:

Respuesta :

jcherry99
rho = R * A/l
rho is the resistivity in ohm meters.
R is the resistance in ohms
A is the cross sectional area in meter^2
l is in meters.

Answer:

[tex]\rho = \frac{RA}{L}[/tex]

Explanation:

.As we know that the resistance of the wire is given as

[tex]R = \rho \frac{L}{A}[/tex]

here we know that

A = cross-sectional area

L = length

R = resistance of wire

now multiply both sides of above equation with Area

[tex]R A = \rho L[/tex]

now divide both sides with length of the wire

[tex]\rho = \frac{RA}{L}[/tex]

so above is the expression of resistivity of wire in terms of resistance, Area and length of the wire

Otras preguntas