A rod of 2.0-m length and a square (2.0 mm × 2.0 mm) cross section is made of a material with a resistivity of 6.0 × 10−⁸ Ω ⋅ m. If a potential difference of 0.50 V is placed across the ends of the rod, at what rate is heat generated in the rod? A) 3.0 W B) 5.3 W C) 8.3 W D) 1.3 W E) 17 W

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The Answer of A rod of 2.0-m length and a square (2.0 mm × 2.0 mm) cross section is made of a material with a resistivity of 6.0 × 10−⁸ Ω ⋅ m. If a potential difference of 0.50 V is placed across the ends of the rod, at what rate is heat generated in the rod? A) 3.0 W B) 5.3 W C) 8.3 W D) 1.3 W E) 17 W

A Rod of 2