[DARARepeater] Thursday Night Group

[George]

Upcoming Activities 

Projects

** License Exam Questions of the week

The Thursday Night Group will meet

Thursday, Nov 1 at 7:00 PM at the DARA Clubhouse.

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Things this week:  

1.        Thursday Night Group 7pm NOT 6pm

It was published in this month's RFCarrier that TNG meets at 6pm every
Thursday.  

This is INCORRECT. We meet at 7 PM.

 

2.        Upcoming Activities 

Fort Wayne Hamfest November 17-18

https://mailchi.mp/e69901e54f8f/one-month-warning?e=eb327c8d1d 

3.        ** License Exam Questions of the week

One question is drawn from each of the three question pools. Steve, AE8AT,
is providing these questions.  Thanks Steve

 

Answers are at the end of this email.

 

We received a question regarding the strange mix of letters and numbers that
begin each question.  Every exam question has a unique combination of
letter-number-letter-number.  The first letter is a T, G, or E to identify
the question pool: Technician, General, or Extra.  Next is a single number
representing the category, for example, category zero is safety in all three
exam pools.  The first letter-number pair is called the "sub-element".   The
second letter is a "group" containing related questions.  Example,
subelement G8 is Signals and Emissions, with group C of that sub-element
being Digital Emission Modes.  The questions are numbered sequentially:
G8C01, G8C02, and so forth always with a 2-digit number at the end.  The
question identity is included in case of a typo or some "help" from
autocorrect obscures either the question or the answer.  

 

This week the quiz takes a slightly different route.  Every question is
number 5B09 from the three question pools.

 

T5B09 What is the approximate amount of change, measured in decibels (dB),
of a power increase from 5 watts to 10 watts?

A. 2 dB

B. 3 dB

C. 5 dB

D. 10 dB

 

G5B09 What is the RMS voltage of a sine wave with a value of 17 volts peak?

A. 8.5 volts

B. 12 volts

C. 24 volts

D. 34 volts

 

E5B09 What is the relationship between the current through a capacitor and
the voltage across a capacitor?

A. Voltage and current are in phase

B. Voltage and current are 180 degrees out of phase

C. Voltage leads current by 90 degrees

D. Current leads voltage by 90 degrees

4.        Projects

Bring something to work on.   What you building?

For more information about B-Road Thursday Evening Group Projects.

Go to W8BI homepage ( <http://www.w8bi.org> http://www.w8bi.org) under
Education, Thursday Group.

Or

Go to ( <https://sites.google.com/site/darathursdaynite/>
https://sites.google.com/site/darathursdaynite)

There is a lot of information on this web site with additional content.

Hope to see you on Thursday evening's.

Everyone is invited!!! 

 

 

Answers:

T5B09 = B. There is an equation (with logarithms!) to calculate this.  Or
you can remember doubling or halving the power is about 3dB each time.  The
equation, 10 * log (Power_Now / Power_Before), yields a more precise answer
of 3.010299957 dB.

 

G5B09 = B. RMS is root mean square.  17 times 0.707 (the square root of 2)
is 12.  Without a calculator handy, you can take 2/3 of the peak to get a
ballpark for the RMS.

 

E5B09 = D.  Time to meet Eli the Iceman.  Voltage (E) in an inductor (L)
leads current (I).  Current (I) in a capacitor (C) leads voltage (E).

 

 



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