A current carrying loop of wire is being monitored using a Hall-effect magnetic field probe placed at its centre. The loop is in air and has a radius of 0.5 m. It is required to monitor the magnetic flux in order to trip the circuit breaker if the current exceeds 100 A.
What level of B measured by the probe will correspond to this trip threshold?
The Attempt at a Solution
Would I be right in saying the magnetic field strength is: H = I/2*PI*r = 31.83 A/m ?
I tried to determine B using: B = uH, this gave an incorrect answer, 40 micro Tesla.
The given answer is 1.26*10^-4 T.
Can anybody point me in the right direction?