Q6.2 (b) Use Lenz’s law to determine the direction of induced current in the situations described by Fig. 6.19 b :
A circular loop being deformed into a narrow straight wire.
Here, by changing shape, we are decreasing the area or decreasing the flux, so the current will induce in a manner such that it increases the flux. Since the magnetic field is coming out of the plane, the direction of the current will be adcba.