Electronics (ECE) - MCQ Practice Questions

In a Wien Bridge oscillator, the frequency of oscillation is determined by:

What is the phase shift introduced by a first-order RC low-pass filter at the cutoff frequency (fc)?

A trans-impedance amplifier (TIA) has feedback resistor Rf = 1 MΩ. If the input current is 1 μA, what is the output voltage?

In a Class A amplifier operating at quiescent point Q, if the load line intersects the characteristic curve at VCE = 6V and IC = 50 mA, what is the maximum output power swing (assuming linear operation)?

Which of the following topologies provides the highest input impedance for an amplifier?

In a precision rectifier (ideal diode) circuit using op-amp, what is the key advantage over conventional diode rectifiers?

A cascode amplifier configuration is preferred over single-stage amplifier because it provides:

In a Push-Pull (Class B) amplifier, what is the primary disadvantage that Class AB configuration addresses?

In a feedback amplifier, negative feedback is applied by feeding back output to which junction?

In a BJT differential amplifier, if both inputs are grounded and the tail current source has finite output impedance, what is the effect on CMRR?

In a transimpedance amplifier used for photodiode detection, increasing feedback resistance Rf causes which effect?

For a common-gate FET amplifier, which statement is correct?

In a Schmitt trigger circuit using op-amp, the hysteresis voltage is determined by which factor?

In a summing amplifier with multiple inputs, what determines the output voltage?

Which type of feedback configuration increases both input and output impedance?

In a bridge amplifier circuit for sensor applications, what is the primary advantage?

In a two-stage RC coupled amplifier, why is a coupling capacitor used between stages?

Which of the following statements about op-amp PSRR (Power Supply Rejection Ratio) is correct?

The Fourier transform of a rectangular pulse rect(t/T) is:

A system is BIBO stable if: