Answering this question requires knowing the value of the resistance **R1**, as well as any potential sources of voltage. To start, we must first determine what is known about the circuit.

The first source of information comes from the **StudySoup** article. According to this article, the voltage across resistance **R1** is **V1**. This value can be found by using Ohm’s Law, which states that the voltage across a resistor is equal to the current multiplied by the resistance.

The second source of information comes from the **Chegg** article. According to this article, the voltage across resistance **R1** is **Vi**. This value can be found by using Ohm’s Law, which states that the current through a resistor is equal to the voltage divided by the resistance.

The third source of information comes from the **University of Florida** article. According to this article, the magnitude of the current flowing through resistance **R1** can be determined using the given values for resistance **R1** and potential sources of voltage **ε1** and **ε2**. Once the current is known, Ohm’s Law can be used to determine the voltage across resistance **R1**.

Now that we have determined the sources of information, we can answer the question posed in the title. The voltage **V1** across resistance **R1** can be calculated by using Ohm’s Law and the values determined from the sources of information listed above. This answer will depend on the specific values of resistance and potential sources of voltage for the particular circuit being studied.

This article was last updated on **2023-05-24**.