Answer: Material and temperature.
- A Length of conductor
- B Cross-section area
- C Material and temperature
- D All of the above
Correct answer: C. Material and temperature
Explanation: Resistivity rho is an intrinsic property of the material, varying with temperature but not dimensions.
In series, the same current flows through both resistors; in parallel, the current splits between branches and the voltage across each resistor is the same.
Concept context
Ohm's law, resistors, Kirchhoff's laws, Wheatstone bridge, and cells.