Using Lenz's law, determine the direction of the current in resistor ab of Fig. 29.33 when(a) Switch

Question:

Using Lenz's law, determine the direction of the current in resistor ab of Fig. 29.33 when(a) Switch S is opened after having been closed for several minutes;(b) Coil B is brought closer to coil A with the switch closed;(c) The resistance of R is decreased while the switch remainsclosed.