The deviation of I-V graph from straight line is due to:
Correct answer: B. Increase in temperature and increase in resistance
- A. Decrease in temperature and decrease in resistance
- B. Increase in temperature and increase in resistance
- C. Decrease in temperature and increase in resistance
- D. Increase in temperature and decrease in resistance
Explanation
The most common scenario leading to a deviation from a straight-line I-V graph is an increase in temperature and an increase in resistance. This is often observed in conductors and is known as a positive temperature coefficient of resistance. As temperature rises, the resistance increases, causing a departure from the ideal linear behavior in the I-V graph.
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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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