The load impedance ZL of a CE amplifier has R and L in series. The phase differe

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Question
The load impedance Z_L of a CE amplifier has R and L in series. The phase difference between output and input will be
Options
A. 180�
B. 0
C. more than 90� but less than 180�
D. more than 180� but less than 270�

Correct Answer

more than 180� but less than 270�

Explanation

It is 180� for purely resistive load and between 180� and 270� for R-L load.

Analog Electronics problems

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2. S_i transistor of following figure has a = 0.9 and I_CE= 0, V_EE = 5 V and V_CC = 13 V, then R_E will be if I_EQ = 1 mA
Options
A. 3 k?
B. 4 k?
C. 5 k?
D. 4.3 k?

5. Assertion (A): CE amplifier is the most widely used BJT amplifier
Reason (R): CE amplifier has zero phase difference between input and output
Options
A. Both A and R are correct and R is correct explanation for A
B. Both A and R are correct but R is not correct explanation for A
C. A is correct R is wrong
D. A is wrong R is correct

6. An amplifier with loop gain A? will be more stable for value of A? as
Options
A. 0.95
B. 0.7
C. 1.2
D. 1.5

7. A bridge rectifier circuit has input of 50 Hz frequency. The load resistance is R_L and filter capacitance is C. For good output wave shape, the time constant R_LC should be at least equal to
Options
A. 10 ms
B. 20 ms
C. 50 ms
D. 100 ms

8. In figure The minimum and maximum load currents are
Options
A. 0 and 60 mA
B. 0 and 120 mA
C. 10 mA and 60 mA
D. 10 mA and 120 mA

10. Consider the following statements : A clamper circuit
1. adds or subtracts a dc voltage to a waveform
2. does not change the waveform
3. amplifiers the waveform
Which are correct?
Options
A. 1, 2
B. 1, 3
C. 1, 2, 3
D. 2, 3

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