A Rod (Length = 80 Cm) with a Rectangular Cross

question 22

Multiple Choice

A rod (length = 80 cm) with a rectangular cross section (1.5 mm × 2.0 mm) has a resistance of 0.20 Ω. What is the resistivity of the material used to make the rod?

• A) 6.0 × 10−⁷ Ω ⋅ m
• B) 3.8 × 10−⁷ Ω ⋅ m
• C) 7.5 × 10−⁷ Ω ⋅ m
• D) 3.0 × 10−⁷ Ω ⋅ m
• E) 4.8 × 10−⁷ Ω ⋅ m

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