Electric Machine Daily Quiz #4

The max efficiency is achieved when copper loss is equal to constant loss. here "constant loss" excludes-

For a dc machine with 230 coils, 10 parallel paths and the number of brushes are 6. Number of commutator segments will be-

DC wdg is-

An apprentice places brushes against ______, and no output power is received out of dc machine.

Which of the following type is avoided-

Brushes are placed at-

Sparking during commutation is possible only-