What happens if the direction of present is reversed ?

What happens if the direction of peristalsis is not reversed in animal like cow ?

What will happens if the direction of current through the coil (which is placed in a magnetic field) is reversed every half rotation?

What type of force is acting between two parallel wires carrying current in the same direction? What happens if one of the current is reversed?

A rubber band is covered with a conducting and current passed through it in the direction as shown in the figure. What happens, if the current is reversed in the rubber band

What happens if the platelets are not present in the blood?