Resistivity: a 2

question 46

Multiple Choice

Resistivity: A 2.0 mm diameter wire of length 20 m has a resistance of 0.25 Ω. What is the resistivity of the wire?

• A) 5.0 × 10^-7 Ω ∙ m
• B) 3.9 × 10^-8 Ω ∙ m
• C) 4.0 × 10^-7 Ω ∙ m
• D) 16 × 10^-8 Ω ∙ m
• E) 0.25 Ω ∙ m

---

Definitions:

Silica Crystals

Rigid, crystalline structures made of silicon dioxide (SiO2), found in nature as quartz and used industrially and scientifically for various applications.

Spicules

Small, spike-shaped structures found in certain animals like sponges, serving as a skeletal element.

Radial Symmetry

Body plan in which similar parts are arranged around a central axis, like spokes of a wheel.

Tissue Layers

Various layers of cells in an organism that have specific functions and form organs and other body structures.