Holes are more likely to be found in
  1. the valence band of semiconductors.
  2. the conduction band of semiconductors.
  3. the valence band of metals.
  4. the conduction band of metals.
  5. the valence band of insulators.
  6. the conduction band of insulators.



A diode can be used to make a sensitive thermometer because of its sensitivity of current on temperature. In such an application, the diode should be
  1. forward biased.
  2. reverse biased.
  3. unbiased.



In a bipolar junction transistor, a typical value for β is 100. In such a transistor, how does the base current compare to the collector current?
  1. It is 100 times smaller.
  2. It is 100 time larger.
  3. It is the same.
  4. It depends on the bias voltage.
  5. It is zero.



What would happen if a negative voltage was applied to the MOSFET transistor illustrated in Taylor, et al., Figure 14.15, instead of a positive voltage?
  1. There would be a very large current in the gate.
  2. There would be no current between the source and the drain.
  3. There would be a large current between the source and the drain.
  4. The transistor would get very hot.
  5. There would be a large current between the source and the gate.



What would you suspect usually takes the longest with taking a CCD picture?
  1. exposure
  2. readout
  3. about the same
  4. exposure for movies, readout for stills
  5. exposure for stills, readout for movies



Why would extreme UV light, soft x-rays, or electron beam exposure be required to reduce the size of the next generation of integrated circuits?
  1. They have higher energy photons, permitting faster exposure times.
  2. They have shorter wavelengths, reducing the limits of diffraction.
  3. They are more penetrating, allowing for deeper structures.
  4. They are easier to focus.
  5. They work with a wider variety of photoresists.