(a) After the left edge of the loop in Figure 29.17 enters the magnetic field, is the work required to continue pulling the loop through the field at constant speed \(v\) positive, negative, or zero?

(b) As the right edge emerges from the magnetic field, is the work required positive, negative, or zero?

Transcribed Image Text:

Figure 29.17 Work must be done on a conducting loop to move it into a magnetic field because magnetic forces exerted on the loop resist its motion when there is an induced current in the loop (shown in more detail in Figure 29.16). B out of page FB F