Phy problem...electricity1

When the block is moving along the x-axis, there is no induced emf. Hence, the magnetic field lines are pointing in the x direction, i.e. Bx = 0.02 T, By = 0, Bz = 0.

When the block is moving along the y-axis at 3 m/s, V = 12 mV
0.012 = 0.02 x 3(dz)
dz = 0.2 m

When the block is moving along the z-axis at 3 m/s, V = 18 mV
0.018 = 0.02 x 3(dy)
dy = 0.3 m

Hence, dx = 0.25 m