Referencing the table above and the information below, determine the resistance of the following: a) nichrome wire for heating element of an electric toaster is 190 cm long, and has a diameter of 0.05 cm. b) Copper ground wire 10 cm long, with a diameter of 6.3 mm c) Tungsten filament wire 3 cm long, with a diameter of 0.3 mm.

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Referencing the table above and the information below, determine the resistance of the following: a) nichrome wire for heating element of an electric toaster is 190 cm long, and has a diameter of 0.05 cm. b) Copper ground wire 10 cm long, with a diameter of 6.3 mm c) Tungsten filament wire 3 cm long, with a diameter of 0.3 mm.
Resistivities at 20°C
Material
Resistivity (2•m)
Aluminum
2.82 x 10-8
Сopper
1.72 x 10-8
Gold
2.44 x 10–8
Nichrome
150. x 10-8
Silver
1.59 x 10-8
Tungsten
5.60 x 10-8
Transcribed Image Text:Resistivities at 20°C Material Resistivity (2•m) Aluminum 2.82 x 10-8 Сopper 1.72 x 10-8 Gold 2.44 x 10–8 Nichrome 150. x 10-8 Silver 1.59 x 10-8 Tungsten 5.60 x 10-8
Related to resistance is a term called resistivity. Resistivity depends on material type, and is a number with
units of Am. When multiplied by a wire's length divided by its area, resistivity yields the overall resistance of
that length of wire:
A
R = resistivity
(L/A)
L
Transcribed Image Text:Related to resistance is a term called resistivity. Resistivity depends on material type, and is a number with units of Am. When multiplied by a wire's length divided by its area, resistivity yields the overall resistance of that length of wire: A R = resistivity (L/A) L
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