Electronic Devices Circuits Thermal Runaway Online Exam Quiz
Electronic Devices Circuits Thermal Runaway GK Quiz. Question and Answers related to Electronic Devices Circuits Thermal Runaway. MCQ (Multiple Choice Questions with answers about Electronic Devices Circuits Thermal Runaway
Thermal runaway is_________
Options
A : an uncontrolled positive feedback
B : a controlled positive feedback
C : an uncontrolled negative feedback
D : a controlled negative feedback
Discrete transistors T1 and T2 having maximum collector current rating of 0.75A are connected in parallel as shown in the figure. This combination is treated as a single transistor to carry a single current of 1A, when biased with a self bias circuit. When the circuit is switched ON, T1 had draws 0.55A and T2 draws 0.45A. If the supply is kept ON continuously, it is very likely that_________
Options
A : both T1 and T2 get damaged
B : both T1 and T2 will be safe
C : only T1 gets damaged
D : only T2 gets damaged
When the power dissipation increases in a transistor, the thermal resistance_________
Options
A : increases
B : cannot be predicted
C : decreases
D : remains same
When the temperature is increased, what happens to the collector current after a feedback is given?
Options
A : it remains same
B : it increases
C : it cannot be predicted
D : it decreases
The thermal runway is avoided in a self bias because_________
Options
A : of its independence on ?
B : of the positive feedback produced by the emitter resistor
C : of the negative feedback produced by the emitter resistor
D : of its dependence on ?
Which of the following biasing techniques are prone to thermal runaway?
Options
A : self bias
B : collector to base bias
C : fixed bias
D : the biasing technique is identified by temperature effect
When the collector current is increased in a transistor_________
Options
A : the reverse current is increased
B : the temperature is increased
C : collisions of electrons decrease
D : the emitter does not emit electrons
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