Q. Armature characteristic is drawn across ________

View solution

Q. What is the first step in drawing the armature characteristic?

View solution

Q. In armature characteristic, nature of If at lower values of armature current is ______

View solution

Q. At some point If On OCC, the value of voltage obtained which is more than rated voltage is _______

View solution

Q. External Characteristic is a plot of _____________

View solution

Q. External characteristics for all separately DC generators (except series generator) can be summarized as ____________

View solution

Q. What is Self-excitation in DC shunt generator?

View solution

Q. For self-excited DC generator, field circuit curve in the OCC will be __________

View solution

Q. Intersection of Rf line and magnetization curve will give _____________

View solution

Q. What will happen if field resistance is decreased?

View solution

Q. No-load voltage can’t be defined where _____________

View solution

Q. Machine does not excite to an appreciable value when ___________

View solution

Q. No-load voltage observed at two different field resistance values, is V1 < V2. What will be the relation in field resistance values?

View solution

Q. No-load voltage observed at two different field resistance values, is V1 < V2. What will be the relation in speed if field resistance is kept same for both cases?

View solution

Q. DC generator will not self-excite in __________

View solution

Q. Which of the following is not a reason, behind failing of self-exciting machine?

View solution

Q. By changing the polarity of the armature of failed self-exciting machine, machine can be started.

View solution

Q. Which of the following will be useful to generate positive feedback?

View solution

Q. Characteristics of separately excited DC generator are drawn by keeping _____

View solution

Q. What is the reason behind dropping down of Eₐ with load?

View solution