In items 11 through 30, select the best answer to make each...

In items 11 through 30, select the best answer to make each statement true. Place the letter of your answer in the space provided. The commutator of a DC generator____ a. reverses the direction of the current in the armature. b. changes $\mathrm{AC}$ to $\mathrm{DC}$ within the armature. c. keeps the current in one direction in the load circuit. d. acts only as a sliding electrical contact.

In items 11 through 30, select the best answer to make each statement true. Place the letter of your answer in the space provided.
The commutator of a DC generator____
a. reverses the direction of the current in the armature.
b. changes $\mathrm{AC}$ to $\mathrm{DC}$ within the armature.
c. keeps the current in one direction in the load circuit.
d. acts only as a sliding electrical contact.

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

DC Generator

A DC generator is an electromechanical device that converts mechanical energy into electrical energy, producing a unidirectional current output. It operates on the principle of electromagnetic induction, where a rotating armature within a magnetic field induces an electromotive force (EMF) in the windings.

Commutator

A commutator is a mechanical switch in a DC machine that periodically reverses the direction of current in the armature winding, thereby converting the alternating current induced in the coils into a unidirectional (direct) current in the external circuit. It plays a critical role in ensuring that the output of the generator is DC by rectifying the AC produced within the machine.

Electrical Rectification

Electrical rectification is the process of converting alternating current (AC) into direct current (DC). In a DC generator, this is accomplished mechanically using a commutator, which reverses the connection of the armature windings at the appropriate moment in the rotation, ensuring the flow of current in a single direction in the load circuit.

Transcript

Please give Ace some feedback