Questions about Series and Parallel in video ElectroBOOM

Questions about Series and Parallel in video ElectroBOOM : 1.W hat causes magnetic field in parallel circuit? 2. What if the your experiment failed? 3.What happens to the voltage in a parallel circuit? 4. What if capacitors, resistors and inductors are connected in a series or parallel circuit? 5. How do I determine the correct and incorrect ICT schema in Google? 6. Why the battery is getting low so fast if it runs on the series lamp circuit? 7.In parallel circuit is there any need in switch? 8.Who is the physicist professor in the explanation? 9.What are examples of hidden components in series and parallel circuits? 10.How can a short circuit occur?  and what causes sparks when short as in the video