Question

A negligibly small current is passed through a wire of length 15 m
and uniform cross-section 6.0 x 10-7 m², and its resistance is
measured to be 5.0 Q2. What is the resistivity of the material at the
temperature of the experiment?
once nf 21 at 27.5 °C, and a resistance​

Answer 1

Answer:

r = 2x $10^{-7}$ ohm m

Explanation:

Resistance (R) = 5.0 ohm

Length of wire (L) = 15 m

Area of crossection (A) =  6.0 x $10^{-7}$ m²

Resistivity (r) = ?

R = rL/A

r = RA/L

r = 5 *  6.0 x $10^{-7}$ /15

r = 2x $10^{-7}$ ohm m