# Transcribed Image Text: Mindy, a medical device engineer, is designing an apparatus to monitor the breatng of a patient. The apparatus

Excerpt
magnetic field: Due to practical constraints, the largest magnetic field that the solenoid can actually produce is 2,40 x 10- T. Mindy decides to compensate by using multiple loops of the conductive material in series. How many conductive loops should be in the chest band?

Transcribed Image Text: Mindy, a medical device engineer, is designing an apparatus to monitor the breatng of a patient. The apparatus consists of a
stretchable loop of conductive material wrapped in a small band around the patient’s chest. A constant uniform external
magnetic field is produced by a nearby solenoid. As the patient inhales, s chest expands, stretcng the chest band. The
resulting increase in the area of the loop causes an emf to be induced in the loop. By measuring the induced emf, a device
user can estimate the patient’s breatng rate.
Mindy needs the apparatus to be able to detect a change in area as small as 2.30 cm occuring over a time period of 1.50 s. If
the minimum emf that can be reliably detected is 3.00 x 104 V, what is the magnitude of the minimum external magnetic
field that would be needed from the solenoid?
magnitude of minimum external magnetic field:
Due to practical constraints, the largest magnetic field that the solenoid can actually produce is 2,40 x 10- T. Mindy decides
to compensate by using multiple loops of the conductive material in series. How many conductive loops should be in the
chest band?