Superconductors Can Carry Very Large Currents with No Resistance $\pi$ *10 Sup>- ⁷ T

Multiple Choice

Superconductors can carry very large currents with no resistance. If a superconducting wire is formed into a solenoid of length 50.0 cm with 250 turns, what is the magnetic field inside the solenoid when the current is 10⁴ A? (µ₀ = 4 $\pi$ *10 sup>- ⁷ T.m/A)

A) 12.6 T
B) 2.50 T
C) 1.25 T
D) 6.28 T