The variables R and z are constants for all elements ds, therefore the integral ... B dA = BdA and the above equation becomes. The SI units for magnetic flux is ...
29-4. Ampere s Law. Same current (parallel or antiparallel) ... 29-4. Ampere s Law. A Long Line of Current (Inside) 29-5. Solenoids. Solenoid. 29-5. Solenoids ...