In figure The minimum and maximum load currents are 0 and 60 mA 0 and 120 mA 10

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Question
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

Correct Answer

0 and 120 mA

Explanation

When R_L = ?, I_L = 0,

When R_L = 100 ?, In figure The minimum and maximum load currents are 0 and 60 mA 0 and 120 mA 10 mA and 60 mA 10 mA a or 120 mA.

Analog Electronics problems

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1. 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

2. 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

3. 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�

5. 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?

7. 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

8. Gain of the amplifier is 'A'. Then the I/P impedance and O/P impedance of the closed loop amplifier shown below would be
Options
A.
B.
C.
D.

9. In a CE amplifier the input impedance is equal to the ratio of
Options
A. ac base voltage to ac base current
B. ac base voltage to ac emitter current
C. ac emitter voltage to ac collector current
D. ac collector voltage to ac collector current

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