Nate Electrical Practice Exam

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Prepare for the Nate Electrical Exam. Enhance your skills with flashcards and multiple choice questions, each question offering hints and explanations. Ace your exam with confidence!

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What does Ohm's law express?

E = IR
E = PR
R = IE
I = RP

The correct answer is: E = IR

Ohm's law expresses the relationship between voltage (E), current (I), and resistance (R) in an electrical circuit. The formula E = IR indicates that the voltage across a conductor is directly proportional to the current flowing through it when the resistance is constant. In this equation, E represents the voltage measured in volts, I represents the current in amperes, and R represents the resistance in ohms. This fundamental principle is crucial in electrical engineering and physics as it allows for the calculation of one of the three variables if the other two are known. Understanding this relationship is vital for analyzing and designing electrical circuits effectively. The other options present variations of the relationships concerning electrical terms, but they do not accurately represent Ohm's law. They either rearrange the terms improperly or apply them in a manner inconsistent with the established relationship defined by Ohm's law.