Explanation: The heat generated in a conductor is a direct result of electrical power dissipation, often described by Joule's Law. This law states that power (P), which manifests as heat, is calculated by the formula P = I²R. From this formula, we can see: * **P is directly proportional to R (Resistance):** If you double the resistance while keeping the current constant, the heat generated will double. This makes option A correct. * **P is directly proportional to I² (the square of the current):** If you double the current while keeping the resistance constant, the heat generated will increase by a factor of four (2²). This makes option B correct. Since both statements A and B accurately describe the factors determining heat generation, option C, "Both A & B," is the correct answer. Understanding this principle is crucial in amateur radio for component selection and managing thermal dissipation in circuits.