(a)[2]
Define the tesla in words.
(b(i))[2]
Determine the magnetic flux density $B$, giving your answer in mT.
(b(ii))[1]
State, with a reason, whether the change in the reading on the newton meter is an increase or a decrease.
(b(iii))[1]
The frame is lowered further, so the vertical sides begin to enter the magnetic field. Suggest what effect this has on the frame.