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quiz 2 questions - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 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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