In Ohm's law calculations, voltage is indicated by which letter?

• A. E
• B. I
• C. V
• D. P

Answer: (A)

In Ohm's Law calculations, voltage is indicated by the letter 'E'. This convention comes from the fact that 'E' stands for electromotive force, which is synonymous with voltage in many contexts. Understanding this notation is essential for correctly applying Ohm's Law, which states that voltage (E) equals current (I) multiplied by resistance (R).

The other letters represent different electrical quantities: 'I' stands for current, 'V' is another common symbol for voltage, and 'P' denotes power. While 'V' is also frequently used to represent voltage in many contexts, 'E' is the symbol explicitly established in Ohm's Law when discussing electromotive force. Recognizing the different notations is crucial for understanding electrical concepts and performing calculations accurately in your apprenticeship training.