A 5.00A Current runs through a 12-guage copper wire (diameter 2.05mm) and through a light bulb. Copper has 8.5 x 10^28 free electrons per cubic meter. (a) How many electrons pass through the light bulb each second? (b) What is the current density of the wire? (c) At what speed does a typical electron pass by any given point in the wire? (d) If you were to use wire of twice the diameter which of the above answer would change? Would they increase or decrease? Tip. Area for circle and velocity from J formula.
A 5.00A Current runs through a 12-guage copper wire (diameter 2.05mm) and through a light bulb. Copper has 8.5 x 10^28 free electrons per cubic meter. (a) How many electrons pass through the light bulb each second? (b) What is the current density of the wire? (c) At what speed does a typical electron pass by any given point in the wire? (d) If you were to use wire of twice the diameter which of the above answer would change? Would they increase or decrease? Tip. Area for circle and velocity from J formula.
Chapter9: Current And Resistance
Section: Chapter Questions
Problem 31P: Consider a wire of a circular cross-section with a radius of R = 3.00mm. The magnitude of the...
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A 5.00A Current runs through a 12-guage copper wire (diameter 2.05mm) and through a light bulb. Copper has 8.5 x 10^28 free electrons per cubic meter. (a) How many electrons pass through the light bulb each second? (b) What is the current density of the wire? (c) At what speed does a typical electron pass by any given point in the wire? (d) If you were to use wire of twice the diameter which of the above answer would change? Would they increase or decrease? Tip. Area for circle and velocity from J formula.
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