A long solenoid has 500 turns per cm and carries a current I. The magnetic field at its center is 7.54 × 10-2 Wb m-2. Another long solenoid has 300 turns per cm and it carries a current \(\frac {I}{3}\). What is the value of magnetic field at the center?

• A. 1.50 × 10-3 Wb/m2
• B. 1.50 × 10-5 Wb/m2
• C. 1.05 × 10-3 Wb/m2
• D. 1.50 × 10-2 Wb/m2