NZART Amateur Examination &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp page 4&nbsp &nbsp &nbsp &nbsp &nbsp NZARTX07 Security code 249733
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<br>

<li>  An inductor and a capacitor are connected in series. At 
the resonant 
frequency the resulting impedance is: 

<ol type = a>

<li> maximum 

<li> minimum 

<li> totally reactive 

<li> totally inductive 


</ol>
<br>

<li>  For your safety, before checking a fault in a mains 
operated power supply 
unit, first: 

<ol type = a>

<li> short the leads of the filter capacitor 

<li> turn off the power and remove the power plug 

<li> check the action of the capacitor bleeder resistance 

<li> remove and check the fuse in the power supply 


</ol>
<br>

<li>  In a forward biased pn junction, the electrons: 

<ol type = a>

<li> flow from p to n 

<li> flow from n to p 

<li> remain in the n region 

<li> remain in the p region 


</ol>
<br>

<li>  The connections to a semiconductor diode are known 
as: 

<ol type = a>

<li> cathode and drain 

<li> anode and cathode 

<li> gate and source 

<li> collector and base 


</ol>
<br>

<li>  <img src = "tetrode.gif" align = right width = 154 height = 
90> 
<extralines = 1 totallines = 6 >
In the figure shown, 3 represents the: 

<ol type = a>

<li> filament of a tetrode 

<li> anode of a triode 

<li> grid of a tetrode 

<li> screen grid of a pentode 


</ol>
<br>

<li>  The following meter could be used to measure the power 
supply current 
drawn by a small hand-held transistorised receiver: 

<ol type = a>

<li> a power meter 

<li> an RF ammeter 

<li> a DC ammeter 

<li> an electrostatic voltmeter 


</ol>
<br>

<li>  A transmitter power amplifier has a gain of 20 dB. The 
ratio of the output 
power to the input power is: 

<ol type = a>

<li> 10 

<li> 20 

<li> 40 

<li> 100 


</ol>
</ol>
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