**Core Concept**
Ohm's law describes the fundamental relationship between the current flowing through a conductor, the electromotive force (voltage) driving the current, and the resistance to the flow of current in the conductor. This law is a cornerstone of electrical engineering and is widely used in medical devices, including defibrillators, pacemakers, and ventilators.

**Why the Correct Answer is Right**
The correct answer is based on the mathematical equation V = IR, where V represents the electromotive force (voltage) in volts, I represents the current in amperes, and R represents the resistance in ohms. The equation states that the voltage applied across a conductor is directly proportional to the current flowing through it, provided the temperature remains constant. This relationship is essential in understanding how electrical impulses are generated and transmitted in the human body.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not accurately represent Ohm's law. Ohm's law does not state that voltage is inversely proportional to current, which would be the case if the equation were V = 1/I.
* **Option B:** This option is incorrect because it incorrectly states the relationship between voltage and current. Ohm's law states that voltage is directly proportional to current, not inversely proportional.
* **Option C:** This option is incorrect because it incorrectly states the relationship between resistance and current. Ohm's law states that voltage is directly proportional to current, not inversely proportional to resistance.

**Clinical Pearl / High-Yield Fact**
In medical devices, Ohm's law is crucial in understanding how electrical impulses are generated and transmitted. For example, in a pacemaker, the electromotive force (voltage) is generated by a battery, and the current is controlled by the resistance of the circuit. Understanding Ohm's law is essential in designing and troubleshooting medical devices.

**Correct Answer:** V = IR