CIT236
Question: Three different Q points are shown on a de load line. The upper Q point represents the:
Answer: maximum current gain
Question: To operate properly, a transistor’s base-emitter junction must be forward biased with reverse bias applied to which junction?
Answer: collector-base
Question: A transistor has a de beta of 250 and a base current, IB, of 20 microamps. The collector current, 1C, equals:
Answer: 5 mA
Question: With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be:
Answer: low resistance
Question: A current ratio of IC/IE is usually less than one and is called:
Answer: alpha
Question: Voltage-divider bias provides
Answer: a stable Q point
Question: If VCC = +18 V, voltage-divider resistor R1 is 4.7 kilo Ohms, and R2 is 1500 Ohms, what is the base bias voltage?
Answer: 4.35 V
Question: The ends of a load line drawn on a family of curves determine:
Answer: saturation and cutoff
Question: In a C-E configuration, an emitter resistor is used for:
Answer: stabilization
Question: When transistors are used in digital circuits they usually operate in the:
Answer: saturation and cutoff regions
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