Analog Electronics MCQs (Part-7)

What is the primary purpose of a differential amplifier?

A Amplify DC signals
B Amplify the difference between two input signals
C Block noise signals
D Amplify both input signals equally

What type of signal is analyzed in small-signal analysis?

A High-frequency signal
B Low-frequency signal
C Large amplitude signal
D Small amplitude signal

Which parameter of an amplifier represents the maximum frequency it can handle effectively?

A Bandwidth
B Slew rate
C Frequency response
D Gain

What is the role of a gain-bandwidth product (GBP) in an amplifier?

A To define noise immunity
B To measure stability
C To define the trade-off between gain and bandwidth
D To increase power efficiency

Which class of power amplifiers operates for the entire 360° of the input cycle?

A Class A
B Class B
C Class AB
D Class C

What is the purpose of a waveform generator?

A To filter signals
B To produce specific waveforms like sine, square, and triangle waves
C To rectify AC signals
D To amplify low signals

What is the most common cause of harmonic distortion in amplifiers?

A Operating in the linear region
B Nonlinear behavior of components
C Low-frequency signals
D Thermal noise

What is the function of a filter in a signal conditioning circuit?

A Amplify signals
B Block specific frequencies while allowing others
C Convert AC to DC
D Generate waveforms

What type of distortion is caused by the overlapping of two frequencies in a circuit?

A Harmonic distortion
B Crossover distortion
C Intermodulation distortion
D Frequency distortion

What is the effect of increasing capacitance in a low-pass RC filter?

A Increases the cut-off frequency
B Decreases the cut-off frequency
C Has no effect on the cut-off frequency
D Increases gain

What is the purpose of a differentiator circuit?

A To produce the integral of the input signal
B To produce the derivative of the input signal
C To generate waveforms
D To amplify noise signals

Which parameter measures the ability of an amplifier to reject noise on both input lines?

A Slew rate
B Common-mode rejection ratio (CMRR)
C Gain-bandwidth product
D Input impedance

Which component is essential in designing integrators and differentiators?

A Inductor
B Resistor
C Capacitor
D Diode

Which type of power amplifier is most suitable for audio applications?

A Class A
B Class B
C Class AB
D Class D

What is a primary drawback of a high-frequency signal in small-signal analysis?

A Increased bandwidth
B Stray capacitance and inductance effects
C Higher gain
D Reduced noise