Magnetic resonance imaging needs a magnetic field strength of 1.5 T. The solenoid is 1.8 m long and 75 cm in diameter. It is tightly wound with a single layer of 2.50-mm-diameter superconducting wire.

Question

What size current is needed?

Thanks in advance

Answer 1

http://www.pa.msu.edu/courses/2001spring/PHY232/lectures/ampereslaw/solenoid.html

all you have to figure is the number of turns, you are given diameter and length.

Answer 2

to find N is it L/2d? length being length of solenoid and d is diameter of the wire or solenoid?

Answer 3

ok i got it finally. thanks

Answer 4

good. but actually, N=L/d