Question

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 1.50-mm-diameter superconducting wire.

Part A

What current is needed?

Express your answer with the appropriate units.

Answer 1

Answer 2

magnetic field of a solenoid is given by

mu*N*I/L

where mu=magnetic permeability=4*pi*10^(-7)

N=number of turns=1

I=current

L=length of the olenoid

then 1.5=4*pi*10^(-7)*1*I/1.8

I=2.1486*10^6 A

Answer 3