In which region of a CE bipolar transistor is collector current almost constant?

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Question
In which region of a CE bipolar transistor is collector current almost constant?
Options
A. Saturation region
B. Active region
C. Breakdown region
D. Both saturation and active region

Correct Answer

Active region

Explanation

It is used as amplifier when it operates in this region.

Electronic Devices and Circuits problems

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1. The v-i characteristics of a FET is shown in figure. In which region is the device biased for small signal amplification
Options
A. AB
B. BC
C. CD
D. BD

2. In which of these is reverse recovery time nearly zero?
Options
A. Zener diode
B. Tunnel diode
C. Schottky diode
D. PIN diode

3. Crossover distortion behaviour is characteristic of
Options
A. class A O/P stage
B. class B O/P stage
C. class AB output stage
D. common pulse O/P state

4. Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.
Options
A. True
B. False

5. An amplifier without feedback has a voltage gain of 50, input resistance of 1 k? and output resistance of 2.5 k?. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 is
Options
A. 1/11 k?
B. 1/5 k?
C. 5 kW
D. 11 kW

7. When a voltage is applied to a semiconductor crystal then the free electrons will flow.
Options
A. towards positive terminal
B. towards negative terminal
C. either towards positive terminal or negative terminal
D. towards positive terminal for 1 ?s and towards negative terminal for next 1 ?s

8. In a bipolar transistor the barrier potential
Options
A. 0
B. a total of 0.7 V
C. 0.7 V across each depletion layer
D. 0.35 V

9. The word enhancement mode is associated with
Options
A. tunnel diode
B. MOSFET
C. JFET
D. photo diode

10. At very high temperatures the extrinsic semi conductors become intrinsic because
Options
A. drive in diffusion of dopants and carriers
B. band to band transition dominants over impurity ionization
C. impurity ionization dominants over band to band transition
D. band to band transition is balanced by impurity ionization

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