Resistance of carbon filament lamp _ as the applied voltage increases.
Correct answer: A. Increases
- A. Increases
- B. Decreases
- C. Remains same
- D. None of the above
Explanation
This option suggests that as the applied voltage increases, the resistance of the carbon filament lamp also increases. This is the correct option. When voltage increases, the temperature of the filament increases as well, causing an increase in resistance due to the increase in temperature. This phenomenon is known as the positive temperature coefficient (PTC) effect.
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About Current Electricity
Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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