If the outer coil of the previous problem is rotated through 90° about a diameter, what would be the magnitude of the magnetic field B at the center?

Question

Philoid · Accepted Answer

Given, for outer circle,

Number of turns ,

current,

Radius,

therefore, magnetic field is pointing west,

for inner circle,

Number of turns ,

current,

Radius,

therefore, magnetic field is pointing downwards,

.

Therefore, total magnetic field is