Ham Amateur Radio Technician Practice Exam 2025 – The Complete All-in-One Guide to Exam Success

Question: 1 / 470

What effect does adding resistance to a circuit typically have on current flow?

Increases current flow

Decreases current flow

Adding resistance to a circuit typically leads to a decrease in current flow. This relationship is primarily defined by Ohm's Law, which states that current (I) is equal to the voltage (V) divided by the resistance (R) in a circuit: \( I = \frac{V}{R} \).

When resistance is increased, assuming the voltage remains constant, the overall current must decrease because there is more opposition to the flow of electric charge. This effect is crucial in understanding how circuits behave, especially when designing circuits or troubleshooting issues.

The other assertions—such as adding resistance increasing current flow or having no effect—do not accurately reflect the principles of electrical circuits. It's also not limited to only AC circuits; this principle applies to both AC and DC circuits uniformly.

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Has no effect on current flow

Only affects AC circuits

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