Magnetic resonance imaging needs a magnetic field strength of approximately 3. 58 T. They use a solenoid that is tightly wound, has a length of 3. 50 m, and diameter 87. 0 cm. The wire that makes up the solenoid has a diameter of 2. 80 mm. To get the necessary magnetic field, what current is required?
a. 1. 25×10¹⁰ A
b. 2. 48×10⁵ A
c. 7. 98×10³ A
d. 9. 97×10⁶ A