Final answer:
The voltage across the 7 ohm resistor in parallel with another resistor is equal to the total applied voltage to that parallel combination, as per the characteristics of a parallel circuit and Ohm's Law.
Step-by-step explanation:
To determine the voltage across the 7 ohm resistor which is in parallel with a 15 ohm resistor, we need to consider how voltage behaves in a parallel circuit. In a parallel circuit, the voltage across each resistor is the same. Therefore, if we know the total voltage supplied to both resistors, which is the same as the voltage across the entire parallel combination, we can directly state that this same voltage is present across the 7 ohm resistor.
According to Ohm's Law, which states that the voltage (V) across a resistor equals the current (I) flowing through it times its resistance (R), or V = IR, the voltage is consistent across all resistors in parallel. Therefore, without the need for further calculation or the given total voltage, the voltage across the 7 ohm resistor is the same as the total voltage applied to the parallel combination of the resistors.
If additional details about the total voltage or current were provided, those could be used to confirm the given assumption, but in this instance, information about the rest of the circuit, including total voltage, is not provided.