Can you give a reason for it (deflection of wire)?

Define : Oxygen dissociation curve. Can you give reason for its sigmoid appearance ?

can you give reasons why a health worker or a nurse does not fall sick as often as we do?

A coil made of insulated copper wire is connected to a galvanometer . i] What happens to the deflection of the galvanometer if this coil is moved towards a stationary bar magnet and then ii] Moved away from it ? Give reason for you answer and name the phenomenon involved.

A magnetic compass shows a deflection when placed near a current-carrying wire. How will the deflection of the compass get affected if the current in the wire is increased? Support your answer with a reason.