(a)[3]
EITHER: Explain why a current flows in the circuit as the magnet moves.
(a)[1]
OR: State the name of the logic gate drawn in Fig. 7.2.
(b(i))[1]
OR: Fig. 7.3 shows two of these logic gates linked to form a bistable circuit. Terminals P and Q are each at logic level 0. Terminal X is at logic level 1. Explain why terminal Y is at logic level 0.
(b(ii))[1]
Terminal P is briefly linked to a supply at logic level 1. State what happens to the logic level at terminal X and the logic level at terminal Y.
(b(iii))[1]
Terminal P goes back to logic level 0 again. State the effect of this return to 0 on the logic level at terminal X and on the logic level at terminal Y.
(b(iv))[1]
State how this circuit demonstrates memory.