A wire 50.0 m long and 2.00 mm in diameter is connected to a source with a potential difference of 9.11 V, and the current is found to be 5.72 A. Assume a temperature of 20°C and, using the table below, identify the metal out of which the wire is made. copper, gold, iron, or silver
Ohm's law
Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.
Path of Least Resistance
In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.
A wire 50.0 m long and 2.00 mm in diameter is connected to a source with a potential difference of 9.11 V, and the current is found to be 5.72 A. Assume a temperature of 20°C and, using the table below, identify the metal out of which the wire is made. copper, gold, iron, or silver
![Resistivities and Temperature Coefficients of Resistivity
for Various Materials (at 20°C)
Resistivity Temperature Coefficient
(w . v)
of Resistivity [(°C)-1]
Material
Silver
1.59 x 10-8
3.8 x 10-3
Copper
1.7 x 10-8
3.9 x 10-3
Gold
2.44 x 10-8
3.4 x 10-3
Aluminum
2.82 x 10-8
3.9 x 10-3
Tungsten
5.6 x 10-8
4.5 x 10-3
Iron
10.0 x 10-8
5.0 x 10-3
Platinum
11 x 10-8
3.92 x 10-3
Lead
22 x 10-8
3.9 х 10-3
Nichrome
a
150 x 10-8
0.4 x 10-3](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1330645c-70c6-4cdc-9d97-c0134202313b%2F600d0e6f-6f0e-4e95-b68e-b201c5af5ead%2F1p0p6vo_processed.png&w=3840&q=75)
Given Information:
The length of the wire (l) = 50 m
The diameter of the wire (d) = 2.00 mm = 2×10-3 m
The potential difference applied (V) = 9.11 V
The current passing through the wire (I) = 5.72 A
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