Question

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 motor____ a. acts as a sliding contact only. b. reverses the current in the armature conductors. c. acts as bearing points for the commutator. d. reverses the current in the load circuit.

Name: Problem 30, Chapter 15: Electricity 1: Devices, Circuits and Materials
Uploaded: 2022-02-25T13:54:18-08:00
Duration: 1 min 10 s
Channel: Hunza Gilgit
Description: 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 motor a. acts as a sliding contact only. b. reverses the current in the armature conductors. c. acts as bearing points for the commutator. d. reverses the current in the load circuit.

   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 motor____
a. acts as a sliding contact only.
b. reverses the current in the armature conductors.
c. acts as bearing points for the commutator.
d. reverses the current in the load circuit.

Electricity 1: Devices, Circuits and Materials

Thomas Kubala 9th Edition

Chapter 15, Problem 30

Instant Answer

Solved by Expert Hunza Gilgit

02/25/2022

Step 1

The commutator is a mechanical switch that reverses the direction of current in the armature windings as the motor rotates. Show more…

Show all steps

Thanks for your feedback!

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 motor____ a. acts as a sliding contact only. b. reverses the current in the armature conductors. c. acts as bearing points for the commutator. d. reverses the current in the load circuit.

Play audio

Feedback

Hunza Gilgit and 58 other educators are ready to help you.

Ask a new question

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

Commutator

A commutator is a rotary electrical switch found in DC machines that periodically reverses the current direction in the armature windings. This reversal is essential to maintain a unidirectional torque in the motor, allowing it to continuously rotate in one direction despite the alternating force on the conductors.

Armature

The armature is the rotating part of a DC motor, where electrical energy is converted into mechanical energy. It consists of windings that interact with the magnetic field to produce torque, and its proper operation depends on the timely reversal of current through its windings.

Electrical Commutation

Electrical commutation is the process by which the current in the armature windings is reversed at specific intervals during the motor’s rotation. This process, achieved by the commutator, ensures that the force on the armature conductors is always directed to sustain continuous and efficient motor operation.

Please give Ace some feedback