1. Which of the following is not a commonly used semiconductor material'? A) carbon B) lead C) silicon D) germanium 2.The characteristic of an ideal diode are those of a switch that can conduct current . A) in both directions B) in one direction only C) in both directions but in only one direction at a time D) depends on the circuit it is used in 3.When a diode is doped with either a pentavalent or a trivalent impurity its resistance will . A) increase B) decrease C) make the resistance stable against variation due to temperature D) None of the above 4.The piecewise linear model, equivalent circuit of the diode consists of ___. A) a junction capacitor, a battery, a small resistor, and the ideal diode B) a battery, a small resistor, and the ideal diode C) a battery and the ideal diode D) the ideal diode 5.When a p-n junction is reverse-biased, its junction resistance is ____. A) high B) low C) determined by the components that are external to the device D) constantly changing
第1题
A、carbon
B、lead
C、silicon
D、germanium
第2题
A、Email interview
B、Telephone interview
C、Video interview
D、Face-to-face interview
第3题
A.Daybreak.
B.Brainwash.
C.Plantation.
D.Sunrise.
第5题
A、attention
B、attitude
C、adjustment
D、ability
第7题
A、Parallelism
B、Cooperation
C、Subordination
D、Division
第8题
A、costs of preparing invoices
B、costs of verifying inventory availability
C、costs of conducting a credit check
D、costs of submitting orders
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