Final answer:
The magnetic field at a distance of 6 meters from the center of a 3T magnet with a 6mT/M gradient pulse applied is 3.036 Tesla, with the closest option being 3 Tesla (B).
Step-by-step explanation:
The question asked is regarding the magnetic field strength at a distance from a magnet when a gradient pulse is applied. Given a 3 Tesla (T) magnet and a gradient of 6 millitesla per meter (6mT/M), we can calculate the magnetic field at a distance of 6 meters from the magnet's center. Since a 6mT/M gradient would increase or decrease the magnetic field by 6mT for every meter away from the center, the magnetic field 6 meters away would be:
3T + (6m * 6mT/M) = 3T + 0.036T = 3.036 Tesla.
However, the provided options do not include 3.036 Tesla, likely due to an approximation in the options or an error in the question. We must choose the closest option that is theoretically obtainable, which is 3 Tesla (B).