Question

What is to be used to convert an AC generator into DC generator ?

• A. split-ring type commutator must be used
• B. slip rings and brushes must be used
• C. a stronger magnetic field has to be used
• D. a rectangular wire loop has to be used

Answer 1

The correct option is A split-ring type commutator must be used

A split-ring commutator makes the current change direction every alternate half-rotation, whereas a slip-ring commutator merely maintains a connection between the moving rotor and the stationary stator. As the direction of current itself changes every half-rotation and split ring commutator reverses the direction of current every alternate half rotation, it essentially converts current direction in every half-cycle to positive. Hence, it converts AC to DC.