What principle does Ohm's Law describe?

What principle does Ohm's Law describe?

• A. The resistance of a conductor of unit length and unit cross-sectional area
• B. The opposition that charges encounter when moving through a material
• C. A relationship between the ratio of voltage and current to resistance
• D. The sum of voltages around a closed loop in a circuit

Answer: (C)

Ohm's Law fundamentally describes the relationship between voltage, current, and resistance in an electrical circuit, effectively illustrating how these three parameters interact. Specifically, it states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor. This relationship can be mathematically expressed as \( V = I \times R \), where \( V \) represents voltage, \( I \) is current, and \( R \) is resistance. Understanding this principle is crucial for analyzing electrical circuits as it allows for calculating one of the three variables when the other two are known, which is essential for troubleshooting and designing circuits.

Ohm's Law fundamentally describes the relationship between voltage, current, and resistance in an electrical circuit, effectively illustrating how these three parameters interact. Specifically, it states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor. This relationship can be mathematically expressed as ( V = I \times R ), where ( V ) represents voltage, ( I ) is current, and ( R ) is resistance.

Understanding this principle is crucial for analyzing electrical circuits as it allows for calculating one of the three variables when the other two are known, which is essential for troubleshooting and designing circuits.