Complete the given sentence 

A generator with commutator produces ......... current.

A generator with a commutator produces direct current.
A commutator is a rotary electrical switch that periodically reverses the current between the rotor and the external circuit.
In a DC generator, the commutator reverses the current direction with each turn serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit.