Having problem with physics coursework regarding magnetic flux density, I'm stuck
For my physics coursework, I've been measuring magnetic flux density of different solenoids.
The solenoids are coils of wire wrapped around a hollow plastic cuboid (e.g. 5cm x 5cm x 30cm). I then stick a probe down the hollow centre which measures the magnetic flux density.
Im unsure about my results because as I increase the volume inside the cuboid (e.g. 7cm x 7cm x 30cm), whilst keeping everything else constant, the magnetic flux density value DECREASES. I thought the value would increase
Is this supposed to happen?