If a = 1.0 cm, b = 3.0 cm, and I = 30 A, what is the magnitude of the magnetic field at point P?

a.
0.62 mT
b.
0.59 mT
c.
0.35 mT
d.
0.31 mT
e.
0.10 mT
Question 2If 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
T
b.
7.5
T
c.
9.0
T
d.
6.0
T
e.
3.6
T