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Homework Help: About resistance

  1. Mar 1, 2009 #1
    Well, these question are concerned with O-Level Physics.

    - A bulb lights brighter when resistance is higher or lower?

    - What about bulbs with filaments and thermistors?

    - Is current directly proportional to resistance for filament lamps?

    - When does current is directly proportional to resistance?

    - When does current is inversely proportional to resistance?

    - What is the relation between voltage and resistance (inversely, directly proportional)

  2. jcsd
  3. Mar 1, 2009 #2


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    Homework Helper

    Welcome to PF.

    So what are your thoughts on how to solve them?
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