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For a 50 Ω resistor for 3 GHz application, the stray capacitance should be less than

1 μF
1 nF
1 pF
0.1 pF

Correct Answer: 0.1 pF

Explanation:

X_C should be at least ten times greater than R. Therefore for 50 Ω resistor at 3 GHz, C should be less than 0.1 pF.

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