A wire of uniform area of cross-section A', length 'L', and resistance R is cut into two equal parts. What will happen to the resistivity of each part?
Correct answer: D. It will remain the same
- A. It will be doubled
- B. It will be one fourth
- C. It will be halved
- D. It will remain the same
Explanation
The correct statement is D. It will remain the same. The resistivity of each part of the wire will remain the same after cutting. Resistivity is an intrinsic property of the material and is not dependent on the length or shape of the wire.
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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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