Ham Radio General Class Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 545

What happens to the output voltage when the load connected to a power supply increases?

The output voltage always increases

The output voltage decreases

When the load connected to a power supply increases, the output voltage typically decreases due to the effects of load regulation and the internal resistance of the power supply.

As the load increases, it draws more current from the power supply. If the power supply cannot maintain its specified output voltage under the increased load, this results in a voltage drop across its internal resistance. This drop occurs because the internal resistance of the power supply acts like a voltage divider, where the output voltage is reduced as more current flows through the internal resistance.

In well-designed power supplies, measures like feedback mechanisms can help to regulate the voltage and minimize variations, but there are practical limits to this. If the load exceeds the power supply's designed capacity, the voltage drop will become more pronounced. Hence, under typical circumstances, as load increases, the output voltage decreases.

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The output voltage remains constant

The output voltage fluctuates randomly

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