Question
What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?
Answer Options
- A) 1.4 watts
- B) 100 watts
- C) 353.5 watts
- D) 400 watts
Correct Answer: B
Explanation
Peak Envelope Power (PEP) is calculated using the peak voltage (V_p) delivered to the load. First, convert the peak-to-peak voltage (V_{\text{pp}}) to peak voltage (V_p): V_p = V_{\text{pp}} / 2. Next, use the power formula P = V_{\text{RMS}}^2 / R but replace V_{\text{RMS}} with V_p / \sqrt{2}, or simply use P = V_p^2 / (2R). Using V_p = 200 \text{ V} / 2 = 100 \text{ V}.
Using the formula P = V_p^2 / (2R) with V_p = 100 \text{ V} and R = 50 \text{ ohms}: P = \frac{V_p^2}{2R} = \frac{(100 \text{ V})^2}{2 \times 50 \text{ }\Omega} = \frac{10000}{100} = 100 \text{ watts.} The PEP produced is 100 \text{ watts}.
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