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quiz 2 questions - RF Cafe Forums

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

Joined: Fri Jul 16, 2004 4:08 pm
Posts: 5
my contribution to the cause... :lol:

What is the energy stored ina 1 pF capacitor at the instantaneous peak voltage of a 1 kVrms source?
A: 1 microjoule
B: 1 picojoule
C: 1.4 picojoules
D: 1.4 microjoules


What is the lowest resonant frequency of a 1.5 meter transmission line that is shorted at both ends?
A: 75 MHz
B: 100 MHz
C: 150 MHz
D: 300 MHz


What is the peak-to-peak Voltage of a 100 Vrms signal sine-wave?
A: 140 V
B: 170 V
C: 200 V
D: 283 V


What is the output power of a linear amplifier with a gain of 20 dB and a sine-wave input of 10 mW?
A: 30 dBm
B: 20 dBm
C: 40 dBm
D: 10 Watts


What is the inductive reactance, expressed in ohms, of a 10 mH coil at 1 MHz?
A: 62.8
B: 628
C: 6.28k
D: 62.8k


What is the capacitive reactance, expressed in ohms, of a 0.01 uF capacitor at 16 MHz?
A: 0.1
B: 0.5
C: 1
D: 2


If the input VSWR of a system is 2:1, what is the approximate return loss in dB?
A: 20
B: 10
C: 5
D: 2


If a wave transformer could match a load of 20 ohms to 5 ohms, what is the characteristic impedance transformer line?
A: 18 ohms
B: 14 ohms
C: 7 ohms
D: 10 ohms


Which S-parameter is used in the calculation of Input Return Loss?
A: S11
B: S12
C: S21
D: S22


What is the peak voltage of a 1kVrms sine-wave?
A: 200 V
B: 1400 V
C: 2800 V
D: 1700 V





Posted  11/12/2012
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