What is the equation for Ohm's law?

What is the equation for Ohm's law?

• A. E = I x R
• B. I = E x R
• C. R = E + I
• D. E = I / R

Answer: (A)

Ohm's Law is a fundamental principle in electrical engineering that relates voltage (E), current (I), and resistance (R). The correct equation is E = I x R, which indicates that the voltage (E) across a conductor is equal to the product of the current (I) flowing through it and the resistance (R) of the conductor. This relationship is critical for analyzing electrical circuits, as it allows technicians to calculate how much voltage is needed to drive a certain current through a resistor of known resistance. Understanding this equation helps in troubleshooting circuits and designing electrical systems. The other choices provided do not accurately represent Ohm's Law. For instance, the equation I = E x R would imply that current increases with both voltage and resistance, which contradicts the definition of resistance as a factor that limits current flow. Similarly, R = E + I and E = I / R are incorrect formulations according to the established relationship put forth in Ohm's Law. Understanding Ohm's Law and its correct formulation is essential for anyone working in electrical mechanics.

Ohm's Law is a fundamental principle in electrical engineering that relates voltage (E), current (I), and resistance (R). The correct equation is E = I x R, which indicates that the voltage (E) across a conductor is equal to the product of the current (I) flowing through it and the resistance (R) of the conductor.

This relationship is critical for analyzing electrical circuits, as it allows technicians to calculate how much voltage is needed to drive a certain current through a resistor of known resistance. Understanding this equation helps in troubleshooting circuits and designing electrical systems.

The other choices provided do not accurately represent Ohm's Law. For instance, the equation I = E x R would imply that current increases with both voltage and resistance, which contradicts the definition of resistance as a factor that limits current flow. Similarly, R = E + I and E = I / R are incorrect formulations according to the established relationship put forth in Ohm's Law. Understanding Ohm's Law and its correct formulation is essential for anyone working in electrical mechanics.