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Homework Help: Resistor Types

  1. Feb 3, 2015 #1
    I am taking an intro electrical circuits course which requires that I write extensive lab reports. I just completed a really simple lab about calculating resistance when configured in series and parallel, etc.

    In my intro I'm writing a short explanation about resistance, and resistors, and such. For resistors used in a common college lab course, does anyone have an idea what exact "type" of resistor they might be?

    I.E http://www.resistorguide.com/materials/ here are a couple examples of what I mean...I figure they might be one of the film types but I am not sure.

    Any suggestions are appreciated! Thank you very much!
  2. jcsd
  3. Feb 3, 2015 #2


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    Probably carbon composition resistors.

    EDIT: ... oh, wait ... that shape makes it more likely they are carbon film resistors.
  4. Feb 3, 2015 #3
    Thank you! I thought so also...based on the tan shell, but I didn't know if shell color was the defining characteristic. Thank you!
  5. Feb 6, 2015 #4


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    I don't think you can rely on the body colour to mean anything although metal film seem to be mostly blue and carbon film are mostly tan/beige.

    One or two web sites claim...

    blue body = fusible resistor
    white body = non-flammable

    Would be nice to find confirmation of that.

    On very old resistors the body colour was part of the value marking scheme....

    Body colour = 1st digit
    End colour = 2nd digit
    Dot colour = Multiplier
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