Because in this loop there is no Voltage source. The same on loop 3.alan123hk said:
Vo is the voltage output of an AC circuit. It is the voltage that is measured across the load or output component of the circuit.
Vo can be calculated using Ohm's Law, which states that voltage (V) is equal to current (I) multiplied by resistance (R). In an AC circuit, this equation becomes V=IR, where V is the voltage output, I is the current, and R is the resistance of the load.
The value of Vo in an AC circuit can be affected by several factors, such as the frequency of the AC signal, the impedance of the circuit components, and the type of load connected to the circuit.
Vo is the voltage output of an AC circuit at a specific point in time, while Vrms (or root mean square voltage) is the average value of the AC voltage over a full cycle. Vrms is often used to represent the effective voltage of an AC circuit, taking into account the varying voltage levels throughout the cycle.
Finding the Vo of an AC circuit is important because it allows us to understand the behavior and performance of the circuit. This information is crucial for designing and troubleshooting AC circuits in various applications, such as power systems, electronics, and communication systems.