$A$ current $I$ passes through a circular loop $C$ and a solenoid $AB$ as shown below:
$(i)$ What is the polarity of: $(a)$ the face of the loop you are looking at? $(b)$ the end $B$ of the solenoid?
$(ii)$ What is the direction of the magnetic field at the centre of the loop?

(N/A) $(i)$
$(a)$ According to the right-hand thumb rule or by observing the direction of current flow,the face of the loop will behave as a North pole.
$(b)$ By applying the right-hand rule for a solenoid,the end $B$ will also behave as a North pole.
$(ii)$ The magnetic field at the centre of the loop is perpendicular to the plane of the loop,directed along the axis of the loop.