How often is the current in an electrical motor reversed?

Question

every half turn of the armature
every full turn of the brushes
every half turn of the brushes
every full turn of the armature

Answer 1

The current in an electrical motor is reversed every half turn of the armature. This is because the armature rotates within a magnetic field, and as it turns, the current in the coils of wire that make up the armature changes direction every half turn. This reversal of current is what allows the motor to continue rotating in the same direction.