Calculating Potential Difference in a Series Circuit

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The potential difference across a 4.0 ohm resistor with a current of 1.4A is calculated using Ohm's Law (V=IR), resulting in a value of 48V for Va-Vb. The discussion highlights the confusion beginners may face when asked to find potential difference without given voltage. It clarifies that potential difference and voltage are interchangeable terms. The initial struggle with the question reflects common challenges in learning electrical concepts. Understanding these basics is crucial for mastering series circuits.
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1. If the current in the 4.0 ohm resistor is 1.4A. What is the magnitude of the potential difference. Va-Vb?



2. V=IR, 1/Req=1/r1 +1/r2 ...



3. Va-Vb= 48V

I was stuck on beginning of the question. I knew how to start if the voltage is given but now asking me to find the potential difference and make me headache. I'm a beginner on the electrical course.

Thank.
 

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Potential difference and voltage are two names for the same thing.
 
Never mind. Deleted.
 

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