In an unregulated power supply, if load current increases, the output voltage ………..3A. Remains the sameB. DecreasesC. IncreasesD. None of the above

To determine how the output voltage of an unregulated power supply behaves when the load current increases, let's analyze the situation.

1. Understanding Unregulated Power Supplies: An unregulated power supply provides a fixed voltage output but does not adjust for varying loads. As the load current increases (i.e., when a device draws more power), the power supply's internal resistance can lead to a voltage drop.

2. Voltage Behavior with Increasing Load: As the load current increases, the current passing through the internal resistance of the power supply leads to a voltage drop across that resistance (Ohm's Law: $V = I \cdot R$). Therefore, with an increasing load current, the output voltage is likely to decrease due to the voltage drop across the internal resistance.

3. Conclusion: Since an unregulated power supply is unable to adjust its output voltage in accordance with changes in load, the correct answer is:

Final Answer: B. Decreases