The electrical resistance of a conductor depends upon. (A) Size of conductor(B) Temperature of conductor(C) Geometry of conductor(D) All of these

(D) All of these

The electrical resistance of a conductor depends on:

(A) Size of conductor: The resistance of a conductor is directly proportional to its length and inversely proportional to its cross-sectional area. In other words, a longer conductor and a thinner conductor (smaller cross-sectional area) will have higher resistance.

(B) Temperature of conductor: The resistance of most conductors increases with an increase in temperature. This phenomenon is described by the temperature coefficient of resistance, which varies from material to material. For most metals, including copper and aluminum, the resistance increases as the temperature rises.

(C) Geometry of conductor: The shape and geometry of the conductor can also affect its resistance. Irregularities or variations in the cross-sectional area along the length of the conductor can lead to changes in resistance. A uniform and well-defined geometry helps maintain consistent resistance.

So, all of these factors (size, temperature, and geometry of the conductor) influence the electrical resistance of a conductor.