NZART Amateur Examination &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp page 4&nbsp &nbsp &nbsp &nbsp &nbsp NZARTX07 Security code 264678
<ol start = 22>
<br>

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

<ol type = a>

<li> maximum 

<li> minimum 

<li> totally reactive 

<li> totally inductive 


</ol>
<br>

<li>  The correct colour coding for the phase wire in a flexible 
mains lead is: 

<ol type = a>

<li> brown 

<li> blue 

<li> yellow and green 

<li> white 


</ol>
<br>

<li>  A low-level signal is applied to a transistor circuit input 
and a 
higher-level signal is present at the output. This effect is 
known as: 

<ol type = a>

<li> amplification 

<li> detection 

<li> modulation 

<li> rectification 


</ol>
<br>

<li>  A semiconductor is said to be doped when small 
quantities of the 
following are added: 

<ol type = a>

<li> electrons 

<li> protons 

<li> ions 

<li> impurities 


</ol>
<br>

<li>  <img src = "pnp.gif" align = right width = 177 height = 
90> 
<extralines = 1 totallines = 6 >
In the figure shown, 2 represents the: 

<ol type = a>

<li> base of a pnp transistor 

<li> drain of a junction FET 

<li> gate of a junction FET 

<li> emitter of a pnp transistor 


</ol>
<br>

<li>  A good voltmeter should have: 

<ol type = a>

<li> a very high internal resistance 

<li> a resistance equal to that of all other components in the 
circuit 

<li> a very low internal resistance 

<li> an inductive reactance 


</ol>
<br>

<li>  An amplifier with a gain of 20 dB has a -10 dB attenuator 
connected in 
cascade. 
The gain of the combination is: 

<ol type = a>

<li> 8 dB 

<li> 10 dB 

<li> -10 dB 

<li> -200 dB 


</ol>
</ol>
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