Chapter 7, Problem 39R

To determine

To Estimate: The distance the wire where the magnetic field strength is $4\text{ μT}$ , using the graph.

Explanation of Solution

Given:

Consider the graph of magnetic field strength vs distance from wire provided in the question.

In the given graph, the smallest division along x-axis is $\text{1 cm}$ and that along y-axis is $\text{4 μT}$ .

The graph shows that magnetic field strength decreases with increase in distance from the wire.

The x- coordinate for the point whose y-coordinate is $\text{4 μT}$ is $5\text{ cm}$ .Thus, thedistance from the wire corresponding to $\text{4 μT}$ is about $5\text{ cm}$ .

Conclusion: The distance the wire where the magnetic field strength is $4\text{ μT}$ is $5\text{ cm}$ .