Answer the following questions.

Why is the direction of the current in an electric motor reversed after every half round?

The direction of the current in an electric motor is reversed after every half round in order to keep it working. Otherwise when North pole of the Magnet comes near the South pole there will be attraction between them and the coil will stop rotating due to which electric motor will not work. Therefore, the commutator helps to change the direction of the coil after every half round.