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In household wiring, usually 12-gauge copper wire (diameter 12 mm) is used. A light bulb is connected to power supply through such a wire. A 5 -Ampere current runs through the wire and the light bulb. a. What is the resistance of 50-meter length of the wire? b. How many electrons pass through the light bulb each second? c. What is the current density in the wire?

In household wiring, usually 12-gauge copper wire (diameter 12 mm) is used. A light bulb is connected to power supply through such a wire. A 5 -Ampere current runs through the wire and the light bulb. a. What is the resistance of 50-meter length of the wire? b. How many electrons pass through the light bulb each second? c. What is the current density in the wire?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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In household wiring, usually 12-gauge copper wire (diameter 12 mm) is used. A light bulb is connected to power supply through such a wire. A 5-Ampere current runs through the wire and the light bulb. a. What is the resistance of 50-meter length of the wire? b. How many electrons pass through the light bulb each second? c. What is the current density in the wire? Room Temp values Substance Sabstance P(0-m) Conductors Metals Semiconductors Pare artn graphise Pure geman Pure sic Silver Copper Aluanum lnsalaters Naher Steel Leat Menu Manganin (Cu XA Ma 14 N45 (stantan (GM N Yi C Aleys Quatzfess saiter TABLE 31-2. Values of the Resistivity and the Temperature Coefficient for Various Substances SUBSTANCE e (2- m) (deg ) Conductors: P (at 0 C) a (0 C-100- C) Ag Cu 1.47 x 10 1.56 x 10 4 263 x 10 6.38 x 10 8.85 x 10 9.83 x 10 . 4.8 x 10 49x 10 " 1.1 x 10 * 41 x 10- 4.3 x 10- 44 x 10- 6.6 x 10 6.5 x 10 3.9 x 10- 2x 10 1 x 10 4 x 10 Al metals Ni Fe Pt Manganin alloys Constantan Nichrome Semiconductors: p (at 20 C) a (at 20 C) C 3.5 x 10 0.45 -5 x 10 -48 x 10 -7.5 x 10 pure Ge Si 640 Insulators: e (at 20 C) Amber Glass Lucite Quartz Sulfur 5 x 10 10 -1014 103 7.5 x 10 10 10-10 Wood acer
Transcribed Image Text:In household wiring, usually 12-gauge copper wire (diameter 12 mm) is used. A light bulb is connected to power supply through such a wire. A 5-Ampere current runs through the wire and the light bulb. a. What is the resistance of 50-meter length of the wire? b. How many electrons pass through the light bulb each second? c. What is the current density in the wire? Room Temp values Substance Sabstance P(0-m) Conductors Metals Semiconductors Pare artn graphise Pure geman Pure sic Silver Copper Aluanum lnsalaters Naher Steel Leat Menu Manganin (Cu XA Ma 14 N45 (stantan (GM N Yi C Aleys Quatzfess saiter TABLE 31-2. Values of the Resistivity and the Temperature Coefficient for Various Substances SUBSTANCE e (2- m) (deg ) Conductors: P (at 0 C) a (0 C-100- C) Ag Cu 1.47 x 10 1.56 x 10 4 263 x 10 6.38 x 10 8.85 x 10 9.83 x 10 . 4.8 x 10 49x 10 " 1.1 x 10 * 41 x 10- 4.3 x 10- 44 x 10- 6.6 x 10 6.5 x 10 3.9 x 10- 2x 10 1 x 10 4 x 10 Al metals Ni Fe Pt Manganin alloys Constantan Nichrome Semiconductors: p (at 20 C) a (at 20 C) C 3.5 x 10 0.45 -5 x 10 -48 x 10 -7.5 x 10 pure Ge Si 640 Insulators: e (at 20 C) Amber Glass Lucite Quartz Sulfur 5 x 10 10 -1014 103 7.5 x 10 10 10-10 Wood acer
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