The resistance of a conductor depends upon
Correct answer: D. The nature, dimension and physical state of conductor
- A. Pot difference between its ends
- B. The nature of material
- C. Dimension
- D. The nature, dimension and physical state of conductor
Explanation
The resistance of a conductor depends on various factors, including:- The nature of the material: Different materials have different resistivities, which determine their inherent resistance to the flow of electric current. For example, metals typically have low resistivities, making them good conductors, while insulating materials have high resistivities.- Dimension: The length, cross-sectional area, and shape of the conductor affect its resistance. Longer conductors generally have higher resistance compared to shorter ones, and conductors with smaller cross-sectional areas also tend to have higher resistance.- The physical state of the conductor: The temperature and mechanical stress experienced by the conductor can influence its resistance. For example, the resistance of a conductor typically increases with an increase in temperature due to the increased collisions between charge carriers and lattice ions.
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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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