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| 1.
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Calculate VC for the amplifier shown below:
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0073106941/443736/image029.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (3.0K)</a>]]> |
| | A) | 8 V |
| | B) | 6 V |
| | C) | 4 V |
| | D) | 2 V |
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| 2.
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What is the expected ac signal voltage gain from base to collector below?
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0073106941/443736/image030.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (3.0K)</a>]]> |
| | A) | between 300 and 600 |
| | B) | between 110 and 220 |
| | C) | between 45 and 90 |
| | D) | about 0.99 |
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| 3.
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What is the expected ac collector signal below?
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| | A) | a sine wave with severe peak clipping (looks rectangular) |
| | B) | a sine wave, with severe clipping on the negative going portions |
| | C) | a sine wave, with severe clipping on the positive going portions |
| | D) | a sine wave, much larger than the input, and phase-inverted |
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| 4.
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What is the output signal of an amplifier with a voltage gain of 25 dB and an input signal of 35 mV? |
| | A) | 11.1 V |
| | B) | 622 mV |
| | C) | 307 mV |
| | D) | 250 mV |
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| 5.
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What is the function of the capacitor in the circuit below?
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| | A) | signal coupling |
| | B) | emitter bypass |
| | C) | base bypass |
| | D) | power supply decoupling |
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| 6.
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Determine VC for the circuit shown below:
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0073106941/443736/image033.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (3.0K)</a>]]> |
| | A) | –1.68 V |
| | B) | –3.57 V |
| | C) | –4.61 V |
| | D) | –8.47 V |
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| 7.
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Which of the following modifications would give the best increase in voltage gain below?
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0073106941/443736/image034.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (3.0K)</a>]]> |
| | A) | add an emitter bypass capacitor |
| | B) | reverse the supply polarity |
| | C) | substitute a higher gain transistor |
| | D) | increase the supply voltage to 12 V |
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| 8.
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Which amplifier configuration has the lowest output impedance? |
| | A) | common collector |
| | B) | common base |
| | C) | common emitter |
| | D) | none of the above |
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| 9.
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Determine the ac signal voltage gain for the circuit shown below:
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0073106941/443736/image035.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (3.0K)</a>]]> |
| | A) | 138 |
| | B) | 106 |
| | C) | 44 |
| | D) | 18 |
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| 10.
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The output signal is taken from the collector in the circuit below. The configuration is:
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| | A) | common collector |
| | B) | common base |
| | C) | emitter follower |
| | D) | common emitter |
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