A copper wire of length 2m and of thickness 1.7*10to the power -6m sq. has a resistance of 2*10 to the power-2 ohm. Calculate the resistivity of the copper wire. (hint: Resistivity(p) =R*A(thickness) /length)
Answers
Answer:
The resistance of an object depends on its shape and the material of which it is composed. The cylindrical resistor in Figure 1 is easy to analyze, and, by so doing, we can gain insight into the resistance of more complicated shapes. As you might expect, the cylinder’s electric resistance
R
is directly proportional to its length
L
, similar to the resistance of a pipe to fluid flow. The longer the cylinder, the more collisions charges will make with its atoms. The greater the diameter of the cylinder, the more current it can carry (again similar to the flow of fluid through a pipe). In fact,
R
is inversely proportional to the cylinder’s cross-sectional area
A
.
Explanation:
Answer:
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