Wires A and B, having equal lengths of 43.3 m and equal diameters of 2.89 mm, are connected in series. A potential difference of 63.3 is applied between the ends of the composite wire. The resistances are RA = 0.112 Q and Rg = 0.639 2. For wire A, what are (a) magnitude J of the current density and (b) potential difference V? (c) Of what type material is wire A made (see the table below)? For wire B, what are (d) J and (e) V? (f) Of what type material is B made? Resistivities of Some Materials at Room Temperature (20°C) Resistivity, p (N.m) Temperature Coefficient of Resistivity, a (K-!) Material Typical Metals Silver 1.62 x 10-8 4.1 × 10-3 Copper Gold 1.69 x 10-8 4.3 x 10- 2.35 x 10- 2.75 x 10- 4.0 × 10-3 Aluminum 4.4 x 10- Manganin" Tungsten 4.82 x 10-8 5.25 x 10-8 0.002 x 10-3 4.5 x 10-3 Iron 9.68 x 10-8 6.5 x 10- Platinum 10.6 x 10- 3.9 x 10- Typical Semiconductors 2.5 x 10 8.7 x 10-4 2.8 x 10-3 -70 x 10- Silicon, pure Silicon, n-type" Silicon, p-type Typical Insulators 1010 – 1014 Glass quartz -10
Wires A and B, having equal lengths of 43.3 m and equal diameters of 2.89 mm, are connected in series. A potential difference of 63.3 is applied between the ends of the composite wire. The resistances are RA = 0.112 Q and Rg = 0.639 2. For wire A, what are (a) magnitude J of the current density and (b) potential difference V? (c) Of what type material is wire A made (see the table below)? For wire B, what are (d) J and (e) V? (f) Of what type material is B made? Resistivities of Some Materials at Room Temperature (20°C) Resistivity, p (N.m) Temperature Coefficient of Resistivity, a (K-!) Material Typical Metals Silver 1.62 x 10-8 4.1 × 10-3 Copper Gold 1.69 x 10-8 4.3 x 10- 2.35 x 10- 2.75 x 10- 4.0 × 10-3 Aluminum 4.4 x 10- Manganin" Tungsten 4.82 x 10-8 5.25 x 10-8 0.002 x 10-3 4.5 x 10-3 Iron 9.68 x 10-8 6.5 x 10- Platinum 10.6 x 10- 3.9 x 10- Typical Semiconductors 2.5 x 10 8.7 x 10-4 2.8 x 10-3 -70 x 10- Silicon, pure Silicon, n-type" Silicon, p-type Typical Insulators 1010 – 1014 Glass quartz -10
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I need help in part d and e and f please
Transcribed Image Text:Wires A and B, having equal lengths of 43.3 m and equal diameters of 2.89 mm, are connected in series. A potential difference of 63.3 V
is applied between the ends of the composite wire. The resistances are RA = 0.112 Q and Rg = 0.639 Q. For wire A, what are (a)
%3D
magnitude J of the current density and (b) potential difference V? (c) Of what type material is wire A made (see the table below)? For
wire B, what are (d) J and (e) V? (f) Of what type material is B made?
Resistivities of Some Materials at Room Temperature (20°C)
Resistivity, p
(N ·m)
Temperature Coefficient
of Resistivity, a (K-')
Material
Typical Metals
1.62 x 10-8
1.69 × 10-8
Silver
Copper
Gold
4.1 × 10-3
4.3 × 10-ª
2.35 x 10-
2.75 x 10-8
4.0 x 10-3
4.4 x 10-3
Aluminum
Manganin"
Tungsten
4.82 x 10-8
5.25 x 10-8
9.68 x 10-8
0.002 x 10-3
4.5 × 10-3
Iron
6.5 x 10-3
Platinum
10.6 x 10-8
3.9 × 10-3
Silicon, pure
Silicon, n-type
Silicon, p-type
Typical Semiconductors
2.5 x 103
8.7 x 10-4
2.8 x 10-3
-70 x 10-3
Typical Insulators
1010 - 1014
~104
Glass
Fused quartz
"An alloy specifically designed to have a small value of a.
Pure silicon doped with phosphorus impurities to a charge carrier density of 10" m
"Pure silicon doped with aluminum impurities to a charge carrier density of 10 m.
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