Which of the following statements are correct about the electrical resistance and resistivity of a wire?<br>1. Both quantities depend on the area of cross-section of the wire<br>2. Both depend on the temperature<br>3. Resistance of the wire is directly proportional to the resistivity of the wire<br>4. Resistivity of the wire is directly proportional to the length of the wire<br>Select the correct answer using the code given below :

  1. A. 1 and 2
  2. B. 1 and 3
  3. C. 2 and 3
  4. D. 2 and 4

Correct Answer: C. 2 and 3

Explanation

Resistance depends on the length, cross-sectional area, material, and temperature. Resistivity depends only on the material and temperature. Therefore, statement 2 and 3 are correct.

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