The solenoid is removed from the enclosure and then used
Chapter 28, Problem 28.83(choose chapter or problem)
The solenoid is removed from the enclosure and then used in a location where the earths magnetic field is 50 mT and points horizontally. A sample of bacteria is placed in the center of the solenoid, and the same current is applied that produced a magnetic field of 150 mT in the lab. Describe the field experienced by the bacteria: The field (a) is still 150 mT; (b) is now 200 mT; (c) is between 100 and 200 mT, depending on how the solenoid is oriented; (d) is between 50 and 150 mT, depending on how the solenoid is oriented.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer