The self bias provides stable Q point large voltage gain high input impedance hi

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Correct Answer

stable Q point

Explanation

Stable Q point is the advantage of self bias circuit.

Analog Electronics problems

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1. To prevent a DC return between source and load, it is necessary to use
Options
A. resistor between source and load
B. inductor between source and load
C. capacitor between source and load
D. either (a) or (b)

2. A forward voltage of 9 V is applied to a diode in series with a 1 k? load resistor. The voltage across load resistor is zero. It indicates that
Options
A. diode is short circuited
B. diode is open circuited
C. resistor is open circuited
D. diode is either short circuited or open circuited

3. The 'h' parameters of the circuit shown in the figure are h_ib = 25 ?, h_fb = 0.999 and h_ob = 10^-6? The Voltage gain is
Options
A. 0.99
B. 1.98
C. 2.0
D. 4

4. Study the circuit of figure and examine the following statements
1. It is an active low pass finer.
2. It is a second order filter.
3. The change in gain is 40 dB/decade.
Which of the above statements are correct?
Options
A. 1, 2 and 3
B. 1 and 2
C. 1 and 3
D. 2 and 3

6. The quiescent collector current I_C, and collector to emitter voltage V_CE in a CE connection are the values when
Options
A. ac signal is zero
B. ac signal is low
C. ac signal is negative
D. either (a) or (b)

7. Figure shows the self bias circuit for CE amplifier and its equivalent circuit. V_BB and R_B respectively are
Options
A. 10 V and 4 k ohm
B. 5 V and 4 k ohm
C. 2 V and 4 k ohm
D. 2 V and 10 k ohm

8. In a circuit of figure, V_s = 10 cos(?t) power drawn by the 2? resistor is 4 watts. The power factor is
Options
A. 0.3
B. 0.4
C. 0.6
D. none

9. In a BJT circuit a pnp transistor is replaced by npn transistor. To analyse the new circuit
Options
A. all calculations done earlier have to be repeated
B. replace all calculated voltages by reverse values
C. replace all calculated currents by reverse values
D. replace all calculated voltages and currents by reverse values

10. An amplifier has a large ac input signal. The clipping occurs on both the peaks. The output voltage will be nearly a
Options
A. sine wave
B. square wave
C. triangular wave
D. (a) or (c)

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