Transistor Biasing

31. The stability factor of a collector feedback bias circuit is __________ that of base resistor bias.

1. The same as
2. More than
3. Less than
4. None of the above

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32. The value of stability factor for a base resistor bias is __________

1. RB (β+1)
2. (β+1)RC
3. (β+1)
4. 1-β

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33. The value of VBE __________

1. Depends upon IC to moderate extent
2. Is almost independent of IC
3. Is strongly dependant on IC
4. None of the above

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34. The zero signal IC is generally __________ mA in the initial stages of a transistor amplifier

1. 4
2. 1
3. 3
4. More than 10

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35. Thermal runaway occurs when __________

1. Collector is reverse biased
2. Transistor is not biased
3. Emitter is forward biased
4. Junction capacitance is high

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36. Transistor biasing is done to keep __________ in the circuit

1. Proper direct current
2. Proper alternating current
3. The base current small
4. Collector current small

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37. Transistor biasing is generally provided by a __________

1. Biasing circuit
2. Bias battery
3. Diode
4. None of the above

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38. Transistor biasing represents __________ conditions

1. 1. a.c.
2. 2. d.c.
3. 3. both a.c. and d.c.
4. 4. none of the above

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39. When the temperature changes, the operating point is shifted due to __________

1. Change in ICBO
2. Change in VCC
3. Change in the values of circuit resistance
4. None of the above

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