(a)[3]
A magnetic field pattern forms around the wire because of the current in the wire. On Fig. 10.2, sketch the pattern and show the direction of the magnetic field as viewed from above the card.
(b(i))[2]
State two different ways of increasing the force due to the current in the wire XY.
(b(ii))[2]
State two different ways of making the force on the wire XY act downwards.