Name:______________________________________

Date:______________________

GEMS 151
Science and Technology of Everyday Life
Hope College

Use this sheet as acover sheet for your answers to the questions below. PLEASE Do Not turn in the other 14 pages of assembly instructions. Please Do Not try to squeeze your answers to the questions into the spaces on this cover sheet.

  1. Instructor or TA signatures:

    Armature and Field Coil Checked: ________________________.

    Armature and Commutator Checked: ________________________.

    Operation of motor verified: ________________________.

    Extra Credit Fan: _______________________.

  2. Explain how the motor works. Use drawings or diagrams to aid in your explanation. This question will require some thought and effort.

     

  3. Explain a fundamental difference in the operating principle of a car engine and an electric motor. If they both produce rotation are they not operating on the same underlying principle?

     

  4. Choose any 5 of the items using an electric motor given in the list below. Describe the function of the motor in each device. For example: What does a motor do in a blowdrier? Answers can be short: a few sentences should be sufficient for each device. (In a blowdrier, a motor to spins the blades of a fan that blows air over the heating coils) You may find some useful information in the textbooks. Other sources of information are available in the library:

    Suggested References:

    McGraw-Hill, Encyclopedia of Science and Technology, REF Q121 M3 (1992).

    How Products are Made, N. Schalger, REF TS 146 .H67 V.1

    Simon and Schuster, "The Way Things Work," REF T 47 .W3913. (A book with the same title as the book by David Macaulay, but with a more traditional format)

    Applications of Electric Motors:

    A list of some applications of electric motors: blow-dryers, washing machines, fans, power drills, blenders, mixers, computer disk drives, tape players, VCRs, Camcorders, CD players, computer CD ROM drives, sewing machines, dishwashers, copy machines, laser printers, car starter motors, elevators, escalators, refrigerators, and vacuum cleaners

 

© 2001 John J. Krupczak, Jr.
All rights reserved. Reproduction in whole or in part in any form or medium without express written permission of the author is prohibited.