Analog Electronics — Part 2 MCQs with Explanations

Medium input resistance and high output resistance is the correct answer to “When a transistor is connected in common emitter mode, it with have”. This question is standard in competitive examination syllabi for Analog Electronics.

ac collector voltage is 180° out of phase with ac base voltage is the correct answer to “In all base driver amplifiers”. This question is standard in competitive examination syllabi for Analog Electronics.

Drain voltage is the correct answer to “The effective channel length of a MOSFET in a saturation decreases with increase in”. This question is standard in competitive examination syllabi for Analog Electronics.

Mechanical ruggedness is the correct answer to “The encapsulation of transistor is necessary for”. This question is standard in competitive examination syllabi for Analog Electronics.

All capacitors is the correct answer to “In deriving ac equivalent circuit for an amplifier circuit we short circuit”. This question is standard in competitive examination syllabi for Analog Electronics.

The mobility decreases is the correct answer to “Thermal runaway is not possible in FET because as the temperature of FET increases”. This question is standard in competitive examination syllabi for Analog Electronics.

1 & 2 are correct is the correct answer to “Consider the following statements: A clamper circuit 1. adds or subtracts a dc voltage to or from a waveform. 2. does not change the shape of the waveform. 3. amplifies the waveform. Which of the statements give above are correct? Of these statements”. This question is standard in competitive examination syllabi for Analog Electronics.

Class-C is the correct answer to “Class-B amplifier has less efficiency compared to”. This question is standard in competitive examination syllabi for Analog Electronics.

A decrease in the output resistance is the correct answer to “In a MOSFET operating in the saturation region, the channel length modulation effect causes”. This question is standard in competitive examination syllabi for Analog Electronics.

74 dB is the correct answer to “A two stage capacitor coupled CE amplifier has stages having a voltage gain of 100 each. It is known that the gain of each stage drops by 3 dB at lower cutoff frequency. What is the overall gain of the multistage amplifier at lower cutoff frequency”. This question is standard in competitive examination syllabi for Analog Electronics.

gm2 is the correct answer to “A Darlington stage is shown in the figure is, if the trans-conductance Q 1 is g m1 and Q 2 is g m2 , then the overall trans-conductance gm is given by”. This question is standard in competitive examination syllabi for Analog Electronics.

10 V is the correct answer to “The input V i to the circuit shown in figure below is a square wave of amplitude ±1 V and frequency 100 Hz. Assuming ideal components, the peak-to-peak amplitude of the output V 0 is:”. This question is standard in competitive examination syllabi for Analog Electronics.

Current shunt feedback is the correct answer to “Which type of negative feedback is used to improve performance of current amplifier”. This question is standard in competitive examination syllabi for Analog Electronics.

1.3 kHz and 54.5% is the correct answer to “For 555 astable multivibrator, if C = 0.01 µF, R A = 10 kΩ, R B = 50 kΩ, the frequency and the duty cycle will be nearly.”. This question is standard in competitive examination syllabi for Analog Electronics.

analysis of BJT at high frequency is the correct answer to “The hybrid-pi model is used for:”. This question is standard in competitive examination syllabi for Analog Electronics.

0.1 Ω is the correct answer to “Consider an inverting amplifier with a feedback resistor R 2 = 10 kΩ and an op-amp with parameters; A oL = 10 5 and R i = 10 kΩ. Assuming the output resistance R 0 of the op-amp is negligible, the closed-loop input resistance at the inverting terminal of an inverting amplifier will be nearly:”. This question is standard in competitive examination syllabi for Analog Electronics.

Slightly less than unity, but positive is the correct answer to “A source follower (using a FET) usually has a voltage gain which is”. This question is standard in competitive examination syllabi for Analog Electronics.

Input resistance is the correct answer to “In the Hybrid-pi model for the BJT small signal analysis, r π denotes”. This question is standard in competitive examination syllabi for Analog Electronics.

172 is the correct answer to “For the circuit shown in figure, the transistor parameters are V BE = 0.7 V , β = 99. If V C is to be set at 7.5 V, the required value (in kΩ) of R B is”. This question is standard in competitive examination syllabi for Analog Electronics.

RF amplifier is the correct answer to “Which one of the following is a wide band amplifier”. This question is standard in competitive examination syllabi for Analog Electronics.

very high input resistance is the correct answer to “As compared to a BJT amplifier, an amplifier made using a JEET is likely to have”. This question is standard in competitive examination syllabi for Analog Electronics.

Q increases is the correct answer to “The bandwidth of a Class C amplifier decreases when the”. This question is standard in competitive examination syllabi for Analog Electronics.

64.3 kHz is the correct answer to “Consider a single stage tuned amplifier having 3 dB bandwidth of 100 kHz. Determine the bandwidth if two such single tuned amplifiers are cascaded:”. This question is standard in competitive examination syllabi for Analog Electronics.

Linear amplifier is the correct answer to “The amplifier which retains the shape of the input signal at the output are called-”. This question is standard in competitive examination syllabi for Analog Electronics.

voltage shunt is the correct answer to “The circuit of the figure is an example of feedback of the following type”. This question is standard in competitive examination syllabi for Analog Electronics.

2.186 kHz is the correct answer to “In a typical 555 astable multivibrator circuit, if R A = R B = 2.2 kΩ and C = 0.1 µF then the free-running frequency is:”. This question is standard in competitive examination syllabi for Analog Electronics.

a-3, b-4, c-1, d-2 is the correct answer to “Match List-I with List-II and select the correct answer using the options given below the lists: List-I List-II a. RC coupling 1. Higher voltage gain & impedance matching b. Inductive coupling 2. Ability to amplify dc and low frequency signals c. Transformer coupling 3. Minimum possible non-linear distortion d. Direct coupling 4. Low collector supply voltages can be used”. This question is standard in competitive examination syllabi for Analog Electronics.

4 mA is the correct answer to “The drain of an N-channel MOSFET is shorted to the gate such that V GS = V DS . The threshold voltage (V T ) of MOSFET is 1 volt. If the drain current (I D ) is 1 mA for V GS = 2 V, then for V GS = 3 V, the drain current I D is-”. This question is standard in competitive examination syllabi for Analog Electronics.

65 kΩ is the correct answer to “In the circuit shown in figure below, β for the BJTs is 99. Assuming the thermal voltage to be 50 mV, the input resistance R i is:”. This question is standard in competitive examination syllabi for Analog Electronics.

2VCEQ is the correct answer to “When a voltage divider biased amplifier has its Q-point near to the middle of the dc-load line, what is the maximum unclipped peak-to-peak output voltage”. This question is standard in competitive examination syllabi for Analog Electronics.

40 dB is the correct answer to “The low frequency gain of LPF shown is”. This question is standard in competitive examination syllabi for Analog Electronics.

coupling coefficient is the correct answer to “The bandwidth of a double tuned transformer coupled amplifier can be adjusted by varying the”. This question is standard in competitive examination syllabi for Analog Electronics.

The input resistance Ri increases and voltage gain Ai decreases is the correct answer to “The amplifier circuit shown below uses a silicon transistor. The capacitors C C and C E can be assumed to be short at signal frequency and the effect of output resistance r 0 can be ignored. If C E is disconnected from the circuit, which one of the following statements is TRUE”. This question is standard in competitive examination syllabi for Analog Electronics.

Transistor capacitances is the correct answer to “The current gain of bipolar transistor drops at high frequency because of”. This question is standard in competitive examination syllabi for Analog Electronics.

High CMRR is the correct answer to “Most of the linear ICs are bases on two transistor differential amplifiers because of”. This question is standard in competitive examination syllabi for Analog Electronics.

$$\frac{9}{{1000}}$$ is the correct answer to “An amplifier has an open loop gain of 1000±10. Negative feedback is provided such that the gain variation remains within 0.1%. What is the amount of feedback β F”. This question is standard in competitive examination syllabi for Analog Electronics.

-11Vi is the correct answer to “For the circuit given below, the voltage V 0 across the op-amp output is:”. This question is standard in competitive examination syllabi for Analog Electronics.

60° is the correct answer to “In phase-shift oscillator, a single RC network introduces a phase change of”. This question is standard in competitive examination syllabi for Analog Electronics.

$$\beta = \frac{{{{\text{V}}_{\text{f}}}}}{{{{\text{V}}_{\text{o}}}}}$$ is the correct answer to “The feedback factor β for a voltage shunt feedback amplifier is given by”. This question is standard in competitive examination syllabi for Analog Electronics.

Maximum Power Transfer Theorem is the correct answer to “Which of the following principles is applied while designing the output matching network for a high power Class-C amplifier”. This question is standard in competitive examination syllabi for Analog Electronics.