Leakage Current & Thermal Runaway Concept - MCQs with answers

Q1. The collector to base current with emitter open circuit configuration in CB mode is extensively dependent on temperature as a result of ________.

a. thermally generated minority carriers
b. thermally generated majority carriers
c. thermally generated majority as well as minority carriers
d. none of the above

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ANSWER: a. thermally generated minority carriers



Q2. The phenomenon of thermal runaway occurs due to maximum and simultanous increase in power dissipation and _________ beyond safe operating value which ultimately results in causing damage to transistor.

a. Collector Current
b. Emitter Current
c. Base Current
d. All of the above

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ANSWER: a. Collector Current



Q3. What is the value of base current if the common base circuit configuration offers an emitter current of 3 mA, collector current of 1.5 mA along with the reverse saturation current is 11 mA?

a. 1.5 mA
b. 3 mA
c. 0.15 mA
d. 0.20 mA

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ANSWER: a. 1.5 mA


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