What is Ohm's law?

What is Ohm's law?

• A. V = IR (Voltage equals current times resistance)
• B. P = IV (Power equals current times voltage)
• C. I = VR (Current equals voltage divided by resistance)
• D. R = IV (Resistance equals current times voltage)

Answer: (A)

Ohm's law is a fundamental principle in electrical engineering and physics that describes the relationship between voltage, current, and resistance. The equation V = IR encapsulates this relationship, stating that the voltage (V) across a conductor is equal to the product of the current (I) flowing through it and the resistance (R) of the conductor. This means that if you increase the voltage in a circuit, while keeping resistance constant, the current will also increase proportionally. Similarly, if the resistance increases while the voltage is held constant, the current will decrease. The other choices represent different relationships in electrical circuits but do not accurately define Ohm's law. For example, one option discusses power, which relates to the rate of energy transfer, while another misrepresents the mathematical relationships between voltage, current, and resistance. Understanding Ohm's law is essential for analyzing and designing electrical circuits, making it foundational knowledge in the field.

Ohm's law is a fundamental principle in electrical engineering and physics that describes the relationship between voltage, current, and resistance. The equation V = IR encapsulates this relationship, stating that the voltage (V) across a conductor is equal to the product of the current (I) flowing through it and the resistance (R) of the conductor. This means that if you increase the voltage in a circuit, while keeping resistance constant, the current will also increase proportionally. Similarly, if the resistance increases while the voltage is held constant, the current will decrease.

The other choices represent different relationships in electrical circuits but do not accurately define Ohm's law. For example, one option discusses power, which relates to the rate of energy transfer, while another misrepresents the mathematical relationships between voltage, current, and resistance. Understanding Ohm's law is essential for analyzing and designing electrical circuits, making it foundational knowledge in the field.