What is happening
You are called to an induction charging pad under a hospital trolley.
The receiver will not charge. Its 0.04 m² coil needs 0.012 Wb of flux, and the field strength is set too low to couple.
Magnetic fluxRunning
Coil flux
0Wb
Required flux
0.01Wb
Field coil. Field strength at 0.064 T. Coil flux 0 Wb, Required flux 0.01 Wb. Currently coil flux is short by 0.009 Wb.
What has to balance