v
magnetic field B1 magnetic field B2 time / s induced current / A
magnetic flux through the loop:    remains unchanged
take current in the anticlockwise direction as positive
magnetic field B1  = –1.0   T (into the screen)
–1 1
velocity v   =  0.10   m s–1
0.1 0.2
magnetic field B2  = –1.0   T (into the screen)
–1 1