Engineering Question:

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The current flow in a semiconductor is due to:
A. holes
B. electrons
C. holes and electrons
D. holes, electrons and ions

Engineering Interview Question
Engineering Interview Question

Answer:

Option C
(holes and electrons)

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Which of the following is used in automatic control of street lights?
A. Thermistor
B. Photo-conductor
C. Transistor
D. Varistor		A good dielectric should have:
A. low losses
B. good heat conductivity
C. high intrinsic strength
D. all of the above