The specific resistance of a wire
Correct answer: D. does not depend on its length, cross section, and mass
- A. varies with its length
- B. varies with its mass
- C. varies with its cross section
- D. does not depend on its length, cross section, and mass
Explanation
The specific resistance of a wire, also known as resistivity, is an intrinsic property of the material and does not depend on the length, cross section, or mass of the wire.Incorrect options: (a), (b), and (c) These options suggest that resistivity depends on various physical attributes of the wire, which is incorrect.
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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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