The resistance of a wire on increasing its temperature will:
Correct answer: A. Increase with a rise in temperature
- A. Increase with a rise in temperature
- B. Decrease with a rise in temperature
- C. Will remain the same
- D. Depends upon the altitude of experimentation
Explanation
If we raise the temperature of the metallic conductor, the resistance will increase because in a conductor, as the temperature rises, the ions within the metal conductor gain energy and begin to oscillate around their mean positions. All of these oscillating ions collide with electrons, causing resistance to increase.
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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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