Resistance of a conductor depends upon_________________?
Correct answer: D. all of above
- A. nature of conductor
- B. dimension of conductor
- C. physical state of the conductor
- D. all of above
Explanation
Resistance follows R = ρL/A, so it depends on the conductor's dimensions and material, while resistivity can also change with physical state or temperature. Option a, nature of conductor, is incomplete because it leaves out length and cross-sectional area.
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About Resistance and Resistivity
Resistance measures opposition to current in a conductor and follows R = V/I for an ohmic conductor, while resistivity is an intrinsic property of the material. Questions use R = ρL/A, examine effects of length, cross-sectional area and temperature, and distinguish resistance, resistivity, conductance and conductivity.
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