Q1.
Connect the coil to the cell and observe the compass. Note down which pole of the magnetic compass is attracted to end A.
Answer
In the set-up shown in Fig. 4.4a it is the north pole of the compass needle (the red tip) that swings towards end A.
North pole of compass is attracted to end A
Unlike poles attract
Therefore end A is the South pole of the electromagnet
Unlike poles attract
Therefore end A is the South pole of the electromagnet
Why this is a valid test: you already know from Grade 6 that unlike poles (North–South) attract and like poles repel. The compass needle is a magnet whose poles you know. So whichever pole of the needle is pulled towards end A must be the opposite of end A — the needle is being used as a ready-made pole detector.
Check it yourself: your own coil may give the opposite answer, and that is not a mistake. Which end is North depends on the direction in which you wound the wire and on which way round you joined the cell. Record what your compass shows.