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?
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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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb3bae496-b29b-443e-8307-d9fa541b6fb0%2F1f45a4da-fbd3-4c69-9b3b-63bc53de3424%2F0ctykaq_processed.jpeg&w=3840&q=75)
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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