WorksheetsDiodes and Rectifiers MCQs
Total questions: 30
Worksheet time: 3600secs
A silicon diode conducts when the applied forward voltage is approximately
1.1 V
0.3 V
0.1 V
0.7 V
In a half-wave rectifier, the ripple factor is approximately
1.57
0.48
1.21
0.81
A Zener diode is primarily used for
Rectification
Amplification
Voltage regulation
Switching
In a full-wave rectifier using a center-tapped transformer, the PIV of each diode is
4Vm
Vm/2
2Vm
Vm
Clipper circuits are used to
Rectify AC
Regulate current
Limit voltage levels
Amplify signals
The ideal op-amp has
Both B and C
Zero output impedance
Infinite input impedance
Zero input impedance
The gain of an inverting amplifier is given by
1+RfRin1 + RinRf 1+RinRf
RfRin RinRf RinRf
−RfRin− RinRf −RinRf
−RinRf- RfRin −RfRin
The bandwidth of an op-amp decreases with
Increase in slew rate
Decrease in gain
Increase in input impedance
Increase in gain
A differentiator circuit behaves as a
High-pass filter
Band-pass filter
Not a filter
Low-pass filter
The slew rate of an op-amp is defined as the
Maximum output voltage
Minimum input offset voltage
Gain-bandwidth product
Maximum rate of change of output voltage
Precision rectifiers use op-amps to
Reduce noise
Improve frequency response
Eliminate diode threshold voltage
Increase current
In an op-amp comparator, the output is
Zero always
Proportional to input
Either +Vsat or −Vsat
Sinusoidal
A Schmitt trigger is used for
Amplification
Noise immunity
Oscillation
Rectification
The CMRR of an op-amp is ideally
Very low
Infinite
Unity
Zero
In a peak detector circuit, the diode is used to
Limit current
Charge the capacitor to peak value
Store charge
Block DC
The output of a non-inverting amplifier is given by
−RinRf- RinRf −RinRf
RfRin RinRf RinRf
1 + RinRf 1 + RinRf
−RfRin− RfRin −RfRin
The input impedance of an ideal op-amp is
Unity
Zero
Finite
Infinite
The purpose of a voltage follower circuit is to
Rectify AC
Amplify current
Provide isolation
Increase voltage
What is the primary function of a low-pass filter in an electronic circuit?
Amplify all frequencies
Allow high frequencies to pass
Block low frequencies
Allow low frequencies to pass
In a differential amplifier, the output voltage is determined by the
Sum of the input voltages
Product of the input voltages
Average of the input voltages
Difference between the input voltages
The purpose of a capacitor in a power supply circuit is to
Limit current
Rectify AC to DC
Increase voltage
Store energy
What is the primary purpose of a transistor in electronic circuits?
Rectification
Switching
Voltage regulation
Signal amplification
In a common-emitter amplifier configuration, the phase of the output signal is
Unchanged
Non-inverted
Delayed
Inverted
What is the function of a band-pass filter in an electronic circuit?
Amplify low frequencies
Allow all frequencies to pass
Block all frequencies
Allow a specific range of frequencies to pass
The primary function of a high-pass filter in an electronic circuit is to
Block high frequencies
Amplify all frequencies
Allow low frequencies to pass
Allow high frequencies to pass
The output voltage of a non-inverting amplifier is determined by the
Product of the input voltages
Difference between the input voltages
Sum of the input voltages
Ratio of feedback and input resistances
What is the main purpose of a voltage regulator in a circuit?
To amplify signals
To convert AC to DC
To filter noise from signals
To maintain a constant output voltage
What is the primary function of a differentiator circuit in signal processing?
To differentiate signals
To amplify signals
To filter signals
To integrate signals
In a voltage divider circuit, the output voltage is determined by the
Product of the input voltages
Ratio of the resistances
Difference between the input voltages
Sum of the input voltages
What is the main purpose of a low-pass filter in audio applications?
To allow low frequencies to pass
To amplify all frequencies
To allow high frequencies to pass
To block low frequencies
