c) Fixed resistors/lamps

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Last updated 7:39 PM on 2/2/26
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3 Terms

1
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  • state the I-V characteristics of a fixed resistor (regardless of the polarity)

  • I ∝ V

    • ohmic conductor

  • resistance = constant

2
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  • state the I-V characteristics of a filament lamp (regardless of the polarity)

  • I ∝ V

    • non-ohmic conductor

  • resistance = increasing

3
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  • describe how a high current in a filament lamp causes a high resistance

  • more electrons

  • more collisions with positive ions

  • electrons + positive ions → more kinetic energy

  • higher temperature