The magnetic field has been measured to be horizontal everywhere along a rectangular path 20 cm long and 4 cm high, as shown in Figure 22.112. Along the bottom the average magnetic field B = 1.5 ×...

The magnetic field has been measured to be horizontal everywhere along a rectangular path 20 cm long and 4 cm high, as shown in Figure 22.112. Along the bottom the average magnetic field B = 1.5 × 10−4 tesla, along the sides the average