Question

Resistivity of a conductor increases with

• A. increase in its length
• B. decrease in its length
• C. increase in its area of cross-section
• D. decrease in its area of cross-section
• E. increase in its temperature

Hint:

Keep in mind that for semiconductors, the behavior of resistivity with temperature can be the opposite of that in conductors.

Answer 1

Answer: (E)

Step 1: Resistivity of a conductor is primarily dependent on the material and its temperature. 
Step 2: As temperature increases, the atomic vibrations within the conductor increase, leading to more frequent collisions and higher resistivity. 
Step 3: Thus, the resistivity of a conductor increases with an increase in its temperature.