I can provide more specialized explanations for any of these.
You can never have a North magnetic pole without a South magnetic pole. If you take a bar magnet and cut it in half, you do not get a lonely North piece and a lonely South piece. Instead, you instantly get two smaller magnets, each with its own North and South pole. Magnetic field lines always form closed, continuous loops. Law 3: Faraday’s Law (Moving Magnets Create Electricity) electromagnetic theory for complete idiots pdf
(CERN): A concise, 12-page summary of Maxwell's equations and basic phenomena. Electromagnetic Field Theory I can provide more specialized explanations for any of these