(a(i))[2]
The magnetic field at Y produced by the current in X causes a force on Y. Put a tick in each relevant blank column of the table to show the direction of this magnetic field and the direction of the force. The rows in the table are: towards the top of the page; towards the bottom of the page; to the left; to the right; into the page; out of the page. The columns are magnetic field at Y and force on Y.
(a(ii))[1]
State and explain whether wire X also experiences a force.
(b)[3]
When switch S is first closed, the galvanometer needle deflects for a short time and then goes back to zero. Explain why this temporary deflection happens.