How Can an AC Generator Be Converted to Produce DC?

[jumpyroo92]

Homework Statement

How might you convert the generator in (http://www.aerospaceweb.org/question/propulsion/jet/generator.jpg) so that instead of producing alternating emf and current it will produce direct current? Would it be a steady D.C? Sketch a graph to show how the emf would vary with time.

Homework Equations

The Attempt at a Solution

(http://image.tutorvista.com/content/electricity/dc-generator.jpeg)
I drew something like this. In other words, I assumed that you just change the slop rings into a commutator.
I don't know about whether or not it'd be steady D.C.
As for the graph I think it's just a sinusoidal graph?

 

[rock.freak667]

The Attempt at a Solution

(http://image.tutorvista.com/content/electricity/dc-generator.jpeg)
I drew something like this. In other words, I assumed that you just change the slop rings into a commutator.
I don't know about whether or not it'd be steady D.C.
As for the graph I think it's just a sinusoidal graph?

yes the commutator will work. But as the angle coil makes with field goes from 90° to 0°, does the emf remain constant?

Why do you think it is a sinusoidal graph? (this will directly show whether or not is a steady DC)