The two metals having the same resistance can be differentiated by their value:
Correct answer: D. Conductivity
- A. Resistance
- B. Conductance
- C. Temperature coefficient of resistivity
- D. Conductivity
Explanation
When two metals have the same resistance, they can be differentiated based on their conductivity. Conductivity is a measure of how easily a material allows the flow of electric current. It is the reciprocal of resistivity.
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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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