Bipolar Junction Transistors (BJT) - General Questions Online Exam Quiz

Bipolar Junction Transistors (BJT) - General Questions GK Quiz. Question and Answers related to Bipolar Junction Transistors (BJT) - General Questions. MCQ (Multiple Choice Questions with answers about Bipolar Junction Transistors (BJT) - General Questions

When transistors are used in digital circuits they usually operate in the:


A : active region

B : breakdown region

C : saturation and cutoff regions

D : linear region

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Three different Q points are shown on a dc load line. The upper Q point represents the:


A : minimum current gain

B : intermediate current gain

C : maximum current gain

D : cutoff point

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A transistor has a of 250 and a base current, I B , of 20 A. The collector current, I C , equals:


A : 500 A

B : 5 mA

C : 50 mA

D : 5 A

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A current ratio of I C /I E is usually less than one and is called:


A : beta

B : theta

C : alpha

D : omega

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With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be:


A : open

B : infinite

C : low resistance

D : high resistance

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In a C-E configuration, an emitter resistor is used for:


A : stabilization

B : ac signal bypass

C : collector bias

D : higher gain

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Voltage-divider bias provides:


A : an unstable Q point

B : a stable Q point

C : a Q point that easily varies with changes in the transistor's current gain

D : a Q point that is stable and easily varies with changes in the transistor’s current gain

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To operate properly, a transistor's base-emitter junction must be forward biased with reverse bias applied to which junction?


A : collector-emitter

B : base-collector

C : base-emitter

D : collector-base

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The ends of a load line drawn on a family of curves determine:


A : saturation and cutoff

B : the operating point

C : the power curve

D : the amplification factor

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If V CC = +18 V, voltage-divider resistor R 1 is 4.7 k , and R 2 is 1500 , what is the base bias voltage?


A : 8.70 V

B : 4.35 V

C : 2.90 V

D : 0.7 V

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