Describe the way in which an alternating current is generated in the lamp.
(a(iii))[2]
State two possible changes that cause a larger maximum current in the lamp.
(b(i))[1]
Determine how many revolutions the coil has completed, from time = 0 to E.
(b(ii))[3]
Draw four lines to link the coil position with the times A, B, C and D.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “maintain a continuous link (between the coil and the lamp) OR stop the contacts reversing every half turn / 180^{\circ} OR stop the wires (to the lamp) twisting / tangling” …