Operating Characteristics of DC Generators

What losses occur in the teeth of dc generator?

For a given dc generator, the external characteristic is plotted . Without using further plots, how can we obtain internal characteristic?

Why is armature of a dc machine made of silicon steel stampings?

Mark the correct order for the external characteristics of compound generators from the below graph.

Identify the machines by observing their external characteristics for (i) and (ii) respectively.

For a 220-V level compound generator the terminal voltage at the half load is

The air gap line represents

Armature characteristic is also known as

The external characteristic is plotted between

Choose the most inappropriate out of the following for the no-load characteristics of the dc generator.

The voltage drop in terminal voltage from no-load to full load in a shunt generator can be compenated using

A student forgot to mark the x-y axes in his experiments but he just noted down the cause and the effect for each. How will he conclude about the armature
characteristic out of the all plotted graphs?

Which of the following characteristics reveal about the magnetization nature of the machine?