A metal bar \(0.20 \mathrm{~m}\) long is suspended from two springs, each with spring constant \(k=0.10 \mathrm{~N} / \mathrm{m}\), and the bar is in an external magnetic field directed perpendicular to the bar length (Figure 27.33). With a current of \(0.45 \mathrm{~A}\) in the bar, the bar rises a distance \(d=1.5 \mathrm{~mm}\).

(a) In what direction is the current?

(b) What is the magnitude \(B\) of the external magnetic field?

Data from Figure 27.33

Transcribed Image Text:

x k = 0.10 N/m d = 1.5 mm B into page I = 0.45 A x x = 0.20 m x k = 0.10 N/m x