Which one of the following physical quantities does NOT affect the resistance of a cylindrical resistor ?

The resistance (R) of a cylindrical resistor is determined by its physical dimensions and the material properties. According to the formula R = ρL/A, resistance is directly proportional to the length (L) of the conductor and the resistivity (ρ) of the material, and inversely proportional to its cross-sectional area (A) [1]. Resistivity is an intrinsic property of the material itself. While Ohm's Law (V = IR) describes the relationship between potential difference, current, and resistance, the resistance value of a specific component is a constant property determined by its geometry and material, provided the temperature remains constant [1]. Therefore, the current flowing through the resistor is a result of the applied voltage and the existing resistance; it does not change the inherent resistance of the cylindrical component itself [1].

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 11: Electricity > What you have learnt > p. 192