A Ribbon of Material with a Rectangular Cross Sectional Area $\varOmega$

A ribbon of material with a rectangular cross sectional area of (0.25 mm * 1.00 mm) ,length 21.9 cm and resistance 1.5 $\varOmega$ is used as a heating element in a toaster.What is the resistivity of the material?

A) 1.50 * 10^-6 $\varOmega$ ·m
B) 1.71 * 10^-6 $\varOmega$ ·m
C) 1.31 * 10^-6 $\varOmega$ ·m
D) 1.97 * 10^-6 $\varOmega$ ·m
E) 1.00 * 10^-6 $\varOmega$ ·m

Correct Answer:

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