# quiz 2 questions - RF Cafe Forums

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 Post subject: quiz 2 questions Posted: Fri Jan 05, 2007 11:00 am
 Captain

Joined: Fri Jul 16, 2004 4:08 pm
Posts: 5
 my contribution to the cause... What is the energy stored ina 1 pF capacitor at the instantaneous peak voltage of a 1 kVrms source? A: 1 microjouleB: 1 picojouleC: 1.4 picojoules D: 1.4 microjoulesWhat is the lowest resonant frequency of a 1.5 meter transmission line that is shorted at both ends?A: 75 MHzB: 100 MHzC: 150 MHzD: 300 MHzWhat is the peak-to-peak Voltage of a 100 Vrms signal sine-wave?A: 140 VB: 170 VC: 200 V D: 283 VWhat is the output power of a linear amplifier with a gain of 20 dB and a sine-wave input of 10 mW?A: 30 dBmB: 20 dBmC: 40 dBmD: 10 WattsWhat is the inductive reactance, expressed in ohms, of a 10 mH coil at 1 MHz?A: 62.8B: 628C: 6.28kD: 62.8k What is the capacitive reactance, expressed in ohms, of a 0.01 uF capacitor at 16 MHz?A: 0.1B: 0.5C: 1D: 2If the input VSWR of a system is 2:1, what is the approximate return loss in dB?A: 20B: 10C: 5 D: 2If a wave transformer could match a load of 20 ohms to 5 ohms, what is the characteristic impedance transformer line?A: 18 ohmsB: 14 ohmsC: 7 ohmsD: 10 ohmsWhich S-parameter is used in the calculation of Input Return Loss?A: S11B: S12C: S21D: S22What is the peak voltage of a 1kVrms sine-wave?A: 200 VB: 1400 VC: 2800 V D: 1700 V

Posted  11/12/2012