A student wishes to suspend a square loop of wire at a 45 angle to the vertical

A student wishes to suspend a square loop of wire at a 45° angle to the vertical using the Earth's magnetic field. The geometry is depicted in FIGURE 22-60. At the student's location the Earth's magnetic field has a magnitude of 5.2 × 10-5 T and is oriented 60.0° below horizontal. All of the counterclockwise torque acting on the loop arises from the magnetic force on the bottom side of the square.

(a) Is the current in the loop clockwise or counterclockwise, as viewed from above?

(b) The loop is a square with mass m = 0.0089 kg and sides of length L = 0.10 m. How much current must flow through the loop to suspend it as shown?

Figure 22-60

Transcribed Image Text:

Pivot 105° mg 45° в