Question

answer the question (the tick is not the correct answer​

Answer 1

Answer:

d. 5*10^-7ohm m

Explanation:

by ohm's law

V=IR

2=(4)R

R=1/2

now resistivity (p)= RA/L where is A is area of cross section and L is length of the wire

substituting values

((1/2)*10^-6)/1

0.5*10^-6

5*10^-7 ohm m

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Answer 2

Explanation:

Resistance of the wire R=IV

∴ R=42=0.5 A

Cross-section area of wire A=1mm2=10−6m2

Length of wire L=1m

Thus resistivity of wire ρ=LRA

∴ ρ=10.5×10−6=5×10−7Ωm