A rod of 2.0-m length and a square (2.0 mm x 2.0 mm) cross section is made of a material with a resistivity of 6.0 x 102 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? 1.3 W 3 W 8.3 W 17 W 5.3 W

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A: Given data:   Area (A) = 1.0 cm2 = 1.0×10-4 m2 Resistivity (ρ) = 1.7×10-8 Ω.m Resistance (R) = 1.0 Ω…

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Q: wire

A: Given: The potential difference across the wire = 4 Volts Length of the wire = 5 m Cross-sectional…

Q: Wire C and wire D are made from different materials and have length Lc = Lp = 2.4 m. The resistivity…

A: Approach to solving the question: Detailed explanation:Examples: Key references:

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.