In an oscilloscope the input to the horizontal plates is a $$100Hz$$ voltage signal. The lissajous patterns $$(A), (B)$$ and $$(C)$$ will be generated when different frequency voltage signals are applied to vertical plates. Match each lissajous pattern to the corresponding frequency by

In an induction motor, if the air gap is increased

Unbalanced supply voltage given to a $$3-$$ phase, data-connected induction motor will cause

In case of a split phase motor, the phase shift between currents in the two windings is around