Q121
Open questionThe voltage divider bias circuit is used in amplifiers quit often because it
Select an option to see the answer and solution.
ECE · all questionsAnalog Electronics
Analog Electronics
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
377
Questions
7/19
Page
Pick an option on a question to see the right answer and solution.
Q122
Open questionThe zener diode shown in following figure is temperature compensated and current gain β of transistor is very high. If current through 100 ohm resistor is 55 mA at 25°C, what is the approximate current through it at 65°C
Select an option to see the answer and solution.
Q123
Open questionThe output time period of a transistorized monostable multivibrator using base resistance Rb and coupling capacitor Cb for the output transistor is given by
Select an option to see the answer and solution.
Q124
Open questionIn a BJT, the Ic = 30 mA. If β = 100, the base current approximately equals
Select an option to see the answer and solution.
Q125
Open questionNegative voltage feedback in amplifiers
S1: Improves gain stability
S2: Reduces non linear distortion
S3: Improves frequency response
S4: Increase circuit stability
S5: Increase Input Impedance and decrease output impedance
S1: Improves gain stability
S2: Reduces non linear distortion
S3: Improves frequency response
S4: Increase circuit stability
S5: Increase Input Impedance and decrease output impedance
Select an option to see the answer and solution.
Q126
Open questionTransformer utilization factor of half wave rectifier is
Select an option to see the answer and solution.
Q127
Open questionAn output signal of a power amplifier has amplitudes of 2.5 V fundamental, 0.25 V second harmonic and 0.1 V third harmonic. The total percentage harmonic distortion of the signal is
Select an option to see the answer and solution.
Q128
Open questionThe voltage gain Av = of the JFET amplifier shown in the figure is
(Assume C1, C2 and Cs to be very large)
(Assume C1, C2 and Cs to be very large)
Select an option to see the answer and solution.
Q129
Open questionThe circuit shown above is:
Select an option to see the answer and solution.
Q130
Open questionIf the bias current in the IC-741 op-amp is IQ = 19 µA and the internal frequency compensation capacitor C1 = 30 pF, the slew rate of the op-amp will be nearly
Select an option to see the answer and solution.
Q131
Open questionWhich class of amplifier has the lowest collector circuit efficiency
Select an option to see the answer and solution.
Q132
Open questionConsider the following statements:
Sziklai pair
1. Is also called complementary Darlington
2. Acts like a single p-n-p transistor with a very high current gain
3. Can be used in class B push-pull power amplifier
Which of these statements are correct?
Sziklai pair
1. Is also called complementary Darlington
2. Acts like a single p-n-p transistor with a very high current gain
3. Can be used in class B push-pull power amplifier
Which of these statements are correct?
Select an option to see the answer and solution.
Q133
Open questionIn an op-amp, non-inverting terminal is grounded, input is connected to inverting terminal and there is no feedback resistance. The output is
Select an option to see the answer and solution.
Q134
Open questionWhat are the output voltage levels for the given circuit? (Assume Si diode)
Select an option to see the answer and solution.
Q135
Open questionA bipolar junction transistor is in saturation region. Given VCC = 10 V, RC = 1 kΩ, hFE = 100 and VCEsat = 0.3 V. What is the collector current in saturation?
Select an option to see the answer and solution.
Q136
Open questionThe first dominant pole encountered in the frequency response of a compensated op-amp is approximately at
Select an option to see the answer and solution.
Q137
Open questionIn the Wien bridge oscillator, the 0° phase-shift is met by using lead-lag network and by using.
Select an option to see the answer and solution.
Q138
Open questionAmong CB, CE and CC configurations of the amplifiers, which is having low voltage gain and high current gain?
Select an option to see the answer and solution.
Q139
Open questionThe output voltage (V0) of the circuit shown in the given figure is
Select an option to see the answer and solution.
Q140
Open questionAn amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is
Select an option to see the answer and solution.