If a permanent bar magnet is broken in half, which choice most accurately describes the properties of these two new halves? each half has both a north pole and a south pole. magnetic poles cannot be isolated on two separate objects. both halves are entirely south poles. magnetic poles can be isolated from each other. one half is entirely a north pole. the other half is entirely a south pole. magnetic poles can be isolated from each other. both halves are entirely north poles. magnetic poles can be isolated from each other.