Calculating Resistor Voltage: Understanding V1 and V2 Across a Resistor

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    Resistor Voltage
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SUMMARY

The voltage across a resistor can be calculated using the formula Vx = V2 - V1, where V1 is the voltage on the left side and V2 is the voltage on the right side of the resistor. This calculation is valid when the positive terminal of the resistor is oriented towards the right. The relationship between voltage (V), current (I), and resistance (R) is defined by Ohm's Law, V = I * R, although the current value (I) must be known to apply this law directly.

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rajohns08
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1. If I know the voltages on both immediate sides of a resistor...lets say v1 is on voltage on left side of resistor, and v2 is voltage on the right side of the resistor, is the votage of the resistor = v2 - v1 if the positive side of resistor is to the right? Or can you not even calclulate the voltage of a resistor just based on the two voltages on either side of it.



2. Voltage drop equals voltage on resistor? i know v = i*r but i don't know value of i.



3. i have calculated v1 and v2 i just need to know if vx is equal to v2-v1
 
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i have calculated v1 and v2 i just need to know if vx is equal to v2-v1
Please show your calculations and post the text of the problem.
 

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