Question

What is the resistance of a 3.5 m copper wire (ro = 1.7 answer test box choice a 2.0 10-8 ohms•m) that has a cross-sectional area of 5.26 answer test box choice a 2.0 10-6 m2?

A) 1.26 ohms
B) 2.45 ohms
C) 3.18 ohms
D) 0.92 ohms

Answer 1

The resistance of the copper wire is approximately 2.975 * 10^-3 ohms.

Step-by-step explanation:

To find the resistance of the copper wire, we can use the formula:

R = (ro * L) / A

• R is the resistance
• ro is the resistivity of copper
• L is the length of the wire
• A is the cross-sectional area of the wire

Plugging in the given values:

R = (1.7 * 3.5) / (2.0 * 10^-6) = 2.975 * 10^-3 ohms

Therefore, the resistance of the copper wire is approximately 2.975 * 10^-3 ohms.