d) resistors, filament lamps, and thermistors

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10 Terms

1
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  • state the relationship between the current in and the potential difference across a fixed resistor

  • directly proportional

2
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  • state the resistance of a fixed resistor

  • constant

3
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  • state whether a fixed resistor is an ohmic conductor or a non-ohmic conductor, and why

  • an ohmic conductor, because it obeys Ohm’s law

4
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  • state the relationship between the current in and the potential difference across a filament lamp

  • not directly proportional

5
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  • state the resistance of a filament lamp

  • increasing

6
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  • describe why the resistance of a filament lamp is increasing

  • the current increases

  • more electrons pass through the filament per second

  • more collisions occur between the electrons and the positive ions

  • the electrons transfer kinetic energy to positive ions

  • the positive ions vibrate more

  • the electrons do more work to travel through the filament

  • the resistance increases

7
New cards

  • state whether a filament lamp is an ohmic conductor or a non-ohmic conductor, and why

  • a non-ohmic conductor, because it does not obey Ohm’s law

8
New cards

  • state the relationship between the current in and the potential difference across a thermistor

  • not directly proportional

9
New cards

  • state the resistance of a thermistor

  • decreasing

10
New cards

  • state whether a thermistor is an ohmic conductor or a non-ohmic conductor, and why

  • non-ohmic conductor, because it does not obey Ohm’s law