(a(i))[1]
On Fig. 8.1, draw an arrow to indicate the direction of the magnetic field at wire Q caused by the current in wire P. Label the arrow B.
(a(ii))[1]
On Fig. 8.1, draw a second arrow to show the direction of the force on wire Q due to the current in wire P. Label the arrow F.
(b(i))[2]
State, with a reason, how the size of the force on wire P compares with the size of the force on wire Q.
(b(ii))[1]
State how the direction of the force on wire P compares with that of the force on wire Q.