Question
How much power is delivered by a voltage of 13.8 volts DC and a current of 10 amperes?
Answer Options
- A) 138 watts
- B) 0.0725 watts
- C) 1.38 watts
- D) 3.8 watts
Correct Answer: A
Explanation
This is a direct application of the power formula, P = E \times I (T5C08). You multiply the voltage by the current to find the power.
P = 13.8\text{ V} \times 10\text{ A} = 138\text{ Watts}. This is the power delivered to a device operating at a common amateur radio supply voltage and drawing a typical amount of current for a medium-power transmitter (T4A01).
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