Analog Electronics MCQ Questions & Answers

51

A transistor is said to be useful to be configured as an amplifier when its β is

A) Less than 0 B) Between 0 and 1 C) Between 1 and 50 D) > 50

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Answer & Solution

Answer: Option D

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52

In BJT, DC load line joins

A) I_C(more) and V_CC B) I_C and V_CE C) I_C(Max) and V_BE D) I_B and V_CE

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Answer & Solution

Answer: Option B

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53

In the circuit of the relaxation oscillator shown in the given figure, what will be the change in the voltage waveform across capacitor, if the voltage V is doubled?
Analog Electronics mcq question image

A) The amplitude as well as the frequency of the waveform will get doubled B) The amplitude will get doubled but the frequency will reduce to half its value C) The amplitude will get doubled but the frequency will remain unchanged D) The Amplitude will remain unchanged but the frequency will get double

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Answer & Solution

Answer: Option C

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54

An N-channel JFET, having a pinch-off voltage (V_p) of -5V, shows a trans conductance (g_m) of 1 mA/V when the applied gate-to-source voltage (V_GS) is -3V. Its maximum trans conductance (in mA/V) is

A) 1.5 B) 2.0 C) 2.5 D) 3.0

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Answer & Solution

Answer: Option C

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55

The circuit using a BJT with β = 50 and V_BE = 0.7 V is shown in the figure. The base current I_B and collector voltage V_C are respectively
Analog Electronics mcq question image

A) 43 µA and 11.4 volts B) 40 µA and 16 volts C) 45 µA and 11 volts D) 50 µA and 10 volts

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Answer & Solution

Answer: Option B

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56

The use of rectifier filter in a capacitor circuit gives satisfactory performance only when the load

A) current is high B) current is low C) voltage is high D) voltage is low

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Answer & Solution

Answer: Option B

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57

In op-amp based inverting amplifier with a gain of 100 and feedback resistance of 47 kΩ, the op-amp input offset voltage is 6 mV and input bias current is 500 nA. the output offset voltage due to an input offset voltage and an input bias current, are

A) 300 mV and 23.5 mV B) 606 mV and 47.0 mV C) 300 mV and 47.0 mV D) 606 mV and 23.5 mV

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Answer & Solution

Answer: Option D

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58

The Ebers Moll model is applicable to

A) Bipolar junction transistors B) NMOS transistors C) Unipolar junction transistors D) Junction field-effect

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Answer & Solution

Answer: Option A

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59

An amplifier circuit is shown in the given figure:
The voltage gain $$\left( {\frac{{{{\text{V}}_0}}}{{{{\text{V}}_{\text{s}}}}}} \right)$$ is:
Analog Electronics mcq question image

A) $$\frac{4}{{3.33}}$$ B) 100 C) 150 D) 160

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Answer & Solution

Answer: Option D

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60

A peak detector comprises a capacitor and an ideal diode and an ac source in series.
The following is true of the circuit

A) The instantaneous current depends only on the instantaneous source voltage B) The diode voltage is always zero C) The instantaneous current depends only on the diode D) The energy stored in the capacitor can never decreases with time

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Answer & Solution

Answer: Option D

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Analog Electronics MCQ Questions & Answers | ECE