When length of copper wire is doubled then resistivity becomes:
Correct answer: C. Remains same
- A. Double
- B. Half
- C. Remains same
- D. Four times
Explanation
Resistivity of wire remains constant. As the length of wire gets doubled, the cross-sectional area will become half of its previous value because volume of wire remains constant
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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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