If a = 20 Cm, B = 5 $\mu$ T
B)75 $\mu$

If a = 2.0 cm, b = 5.0 cm, and I = 20 A, what is the magnitude of the magnetic field at the point P?

A) 4.5 $\mu$ T
B) 7.5 $\mu$ T
C) 9.0 $\mu$ T
D) 6.0 $\mu$ T
E) 3.6 $\mu$ T