Answer: Length.
- A Area of cross-section
- B 1/Length
- C Length
- D Length x Area
Correct answer: C. Length
Explanation: R = rho x L / A. Resistance is proportional to length L and inversely proportional to cross-sectional area A.
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.