GeneralG5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

B
Answer
Electrical principles
Type
A
1.4 watts
B
100 watts
C
353.5 watts
D
400 watts

Answer Notes

To calculate Peak Envelope Power (PEP) from a peak-to-peak voltage, you must first determine the Root Mean Square (RMS) voltage. Start by dividing the peak-to-peak voltage (200 volts) in half to find the peak voltage, which is 100 volts. Next, convert the peak voltage to RMS by multiplying by 0.707 (100 V × 0.707 = 70.7 V). Now you can use the standard power formula P = E^2 / R. Square the RMS voltage (70.7 × 70.7 ≈ 5000) and divide by the 50-ohm resistance (5000 / 50 = 100). The result is 100 watts of power.
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How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?
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What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?