1) Which among the below specified conditions is applicable to prevent the occurrence of thermal runaway in voltage divider bias circuit?
a. V CE < V CC / 2
b. V CE = V CC / 2
c. V CE > V CC / 2
d. None of the above
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Answer
Explanation
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ANSWER: VCE < VCC / 2
Explanation:
No explanation is available for this question!
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2) Which among the below mentioned parameters of transistors is/are likely to get affected or exhibit/s variations due to increase in temperature?
a. Base-to-Emitter voltage (V BE)
b. Reverse Saturation Current ( I CBO)
c. Current Gain (β dc)
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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3) Where should be the position of Q point on the load line, if the transistor is used for amplification purpose?
a. At the point of inception (initial point)
b. At the center
c. At the eventual point (final point)
d. None of the above
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Answer
Explanation
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ANSWER: At the center
Explanation:
No explanation is available for this question!
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4) On which factor/s do/does the value of thermal resistance depend?
a. Size of transistor
b. Type of cooling system
c. Type of heat transfer mechanism
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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5) Which techniques is/are adopted for reducing the drift in the operating point especially when the loss of signal is intolerable?
a. Bias stabilization
b. Bias compensation
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Bias compensation
Explanation:
No explanation is available for this question!
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6) Which process plays a crucial role in devising the independency of operating point over the variations in temperature or transistor parameters?
a. Bias stabilization
b. Bias compensation
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Bias stabilization
Explanation:
No explanation is available for this question!
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7) Which type of temperature dependent resistor exhibits a positive temperature coefficient of resistivity?
a. Thermistor
b. Sensistor
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Sensistor
Explanation:
No explanation is available for this question!
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8) Generally, the resistance of thermistor decreases _______
a. Linearly with an increase in temperature
b. Linearly with the decrease in temperature
c. Exponentially with an increase in temperature
d. Exponentially with the decrease in temperature
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Answer
Explanation
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ANSWER: Exponentially with an increase in temperature
Explanation:
No explanation is available for this question!
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9) What are the consequences of diode compensation for the change in base-to-emitter voltage (VBE) due to temperature?
a. Temperature compensation takes place by variation in forward voltage (V F)
b. Collector current become insensitive to the change in base-to-emitter voltage (V BE)
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Both a and b
Explanation:
No explanation is available for this question!
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10) What is /are the purpose/s of adopting stabilization and compensation techniques?
a. To provide maximum bias
b. To provide thermal stabilization
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Both a and b
Explanation:
No explanation is available for this question!
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