Question

a wire has a diameter of 0.852cm and is 8.49m long. when connected to a 15.5v voltage source, the wire carries a 75.3a current. what is the resistivity, in ohm meters, of the wire?

Answer 1

The resistivity of the wire can be calculated using the given formulas.

Step-by-step explanation:

The resistivity of a wire can be calculated using the formula:

Resistance (R) = Resistivity (ρ) x Length (L) / Cross-sectional Area (A)

In this case, we have the length of the wire (8.49m), the voltage (15.5V), and the current (75.3A). To find the resistivity, we need to find the cross-sectional area of the wire first. The cross-sectional area can be calculated using the formula:

Area (A) = π x (diameter/2)^2

After finding the cross-sectional area, we can substitute the values into the formula to find the resistivity (ρ).

Therefore, the resistivity of the wire can be calculated as 0.01737 ohm meters.