Resistance of a Filament Lamp

• What type of conductors are resistors that maintain constant resistance?

  Ohmic conductors
• Under what condition does the constant resistance of a resistor apply?

  If the temperature does not change
• How does the current through a filament lamp compare to that of a resistor?

  It is not directly proportional to potential difference
• Why does the resistance of a filament lamp increase at high temperatures?

  Atoms vibrate more, causing more collisions
• What does the graph of a filament lamp indicate about resistance as potential difference increases?

  Resistance is increasing as potential difference increases
• What type of lamp is being phased out due to energy inefficiency?

  Filament lamp
• What happens to the filament in a lamp when an electric current passes through it?

  It gets extremely hot and glows
• What is the term used for the very fine wire in a filament lamp?

  Filament
• What is the effect of increasing potential difference on the current in a filament lamp?

  The current increases less than proportionally
• How does the behavior of a filament lamp differ from that of an ohmic conductor?

  A filament lamp's resistance increases with temperature