# The potential difference between the ends of a conductor is proportional to the current flowing in it. This law is

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The correct answer is Ohm’s law (option D). Ohm’s law describes the fundamental relationship between voltage (potential difference), current, and resistance in an electrical circuit. According to Ohm’s law, when a conductor has a constant resistance, the potential difference (voltage) between its ends is directly proportional to the current flowing through it. This means that if the current increases, the voltage increases proportionally, and vice versa, under constant temperature conditions. Ohm’s law is essential for designing and analyzing electrical circuits, determining the proper operation of components like resistors, and calculating the power dissipation in circuits. It provides a foundational principle for understanding how electrical parameters interact and influence each other in various applications, from household wiring to complex industrial electronics. Understanding Ohm’s law is crucial for engineers and technicians in ensuring the efficient and safe operation of electrical systems.