Test your understanding of Section 27.3 Imagine that you move along the axis of the circuit through which current passes in Figure 27.13c, starting...

Test your understanding of Section 27.3 Imagine that you move along the axis of the circuit through which current passes in Figure 27.13c, starting from a point well to the left of the circuit and ending at a point well to the right of it. (a) How does the intensity of the magnetic field vary as you move along this path? (i) It remains the same at all points along the path; (ii) it increases and then decreases; (iii) it decreases and then increases. (b) Does the direction of the magnetic field vary as you move along the path?

a) (i) The intensity of the magnetic field remains the same at all points along the path.
b) No, the direction of the magnetic field does not vary as you move along the path.