So this is a concept that has really been confusing and it is one of a pretty common HSC question so it is as follows:

When a horse shoe made of copper is dropped onto a strong magnet, it experiences electromagnetic braking as there is a changing magnetic field, induced emf, it is complete so induced current and hence induced magnet field which opposes the bar magnet and so slows it down.

If we have a copper horseshoe with a slit, there is a changing magnetic field, and I would assume there is an induced emf, but there will be no induced current and hence no induced magnetic field and hence electromagnetic braking.

Is this correct?

Thanks in advance