1 $Which component is primarily used to select or reject a specific range of frequencies in an electronic circuit?$

A.

Oscillator

B.

Rectifier

C.

Transformer

D.

Filter

2 $An ideal low-pass filter allows signals to pass through it if their frequency is:$

A.

Higher than the cut-off frequency

B.

Within a specific high-frequency band

C.

Lower than the cut-off frequency

D.

Exactly equal to the resonance frequency

3 $What is the formula for the cut-off frequency () of a simple RC filter?$

A.

B.

C.

D.

4 $A high-pass filter can be constructed by swapping the position of the resistor and capacitor in which circuit?$

A.

Voltage follower

B.

Bridge rectifier

C.

Low-pass filter

D.

Band-pass filter

5 $Which filter type passes frequencies within a certain range and rejects frequencies outside that range?$

A.

High-pass filter

B.

All-pass filter

C.

Low-pass filter

D.

Band-pass filter

6 $In the context of filters, what does the term 'Stopband' refer to?$

A.

The phase shift of the signal

B.

The range of frequencies that are attenuated

C.

The range of frequencies that are allowed to pass

D.

The frequency where gain is 0 dB

7 $What is the ideal input impedance of an operational amplifier?$

A.

Zero ()

B.

Infinite ()

C.

D.

8 $What is the ideal output impedance of an operational amplifier?$

A.

B.

Infinite ()

C.

D.

Zero ()

9 $The open-loop voltage gain () of an ideal op-amp is:$

A.

Infinite ()

B.

1

C.

100

D.

0

10 $Common Mode Rejection Ratio (CMRR) is the ratio of:$

A.

Differential gain to Common mode gain

B.

Common mode gain to Differential gain

C.

Input impedance to Output impedance

D.

Output voltage to Input voltage

11 $Which parameter defines the maximum rate of change of the output voltage per unit of time?$

A.

Offset Voltage

B.

Bandwidth

C.

CMRR

D.

Slew Rate

12 $The concept of 'Virtual Ground' is primarily applicable to which op-amp configuration?$

A.

Inverting amplifier with negative feedback

B.

Voltage follower without feedback

C.

Positive feedback oscillator

D.

Open-loop comparator

13 $Why does the concept of virtual ground exist in an ideal op-amp?$

A.

Because the slew rate is zero

B.

Because the output impedance is infinite

C.

Because the open-loop gain is infinite

D.

Because the input impedance is zero

14 $In an ideal op-amp circuit, the current entering the input terminals (and) is considered to be:$

A.

1 Ampere

B.

Infinite

C.

Zero

D.

Depends on the input voltage

15 $What is the voltage gain () of an inverting amplifier with feedback resistor and input resistor ?$

A.

B.

C.

D.

16 $The phase shift introduced by an inverting op-amp configuration is:$

A.

B.

C.

D.

17 $What is the voltage gain () of a non-inverting amplifier?$

A.

B.

C.

D.

18 $If and in an inverting amplifier, what is the gain?$

A.

5

B.

6

C.

-5

D.

-0.2

19 $If and in a non-inverting amplifier, what is the gain?$

A.

0

B.

2

C.

1

D.

-1

20 $Which op-amp configuration acts as a 'Voltage Follower' or 'Unity Gain Buffer'?$

A.

Differentiator

B.

Non-inverting amplifier with and

C.

Summing amplifier

D.

Inverting amplifier with

21 $What is the primary advantage of a Voltage Follower circuit?$

A.

It amplifies voltage significantly

B.

It acts as an impedance matching buffer (high, low)

C.

It inverts the signal phase

D.

It filters out low frequencies

22 $An op-amp summing amplifier (adder) is typically based on which configuration?$

A.

Voltage follower

B.

Inverting configuration

C.

Comparator

D.

Open-loop configuration

23 $In an inverting summing amplifier with three inputs and all resistors equal (), the output voltage is:$

A.

B.

C.

D.

24 $To convert a summing amplifier into an averaging amplifier for 3 inputs, the ratio should be:$

A.

3

B.

C.

Infinite

D.

1

25 $An op-amp subtractor (difference amplifier) produces an output proportional to:$

A.

The product of the two input voltages

B.

The sum of the two input voltages

C.

The difference between the two input voltages

D.

The integral of the input voltage

26 $In a basic differential amplifier (subtractor) circuit, if all external resistors are equal, the output voltage is:$

A.

B.

C.

D.

27 $Which op-amp circuit performs the mathematical operation of integration?$

A.

Comparator

B.

Integrator

C.

Adder

D.

Differentiator

28 $In an ideal op-amp integrator circuit, the feedback element is a:$

A.

Diode

B.

Inductor

C.

Resistor

D.

Capacitor

29 $If a constant DC voltage is applied to the input of an ideal op-amp integrator, the output will be:$

A.

A sine wave

B.

Zero

C.

A constant DC voltage

D.

A ramp voltage (linear increase/decrease)

30 $The output voltage of an ideal integrator is given by:$

A.

B.

C.

D.

31 $In an op-amp differentiator circuit, the input element is a__and the feedback element is a__.$

A.

Capacitor, Resistor

B.

Capacitor, Capacitor

C.

Resistor, Capacitor

D.

Resistor, Resistor

32 $If the input to an ideal differentiator is a triangular wave, the output will be:$

A.

A triangular wave

B.

A square wave

C.

A cosine wave

D.

A sine wave

33 $A major practical disadvantage of the ideal differentiator circuit is:$

A.

It amplifies high-frequency noise

B.

It blocks DC signals

C.

It cannot be built with standard components

D.

It has very low input impedance

34 $When an op-amp is used as a comparator, it typically operates in which mode?$

A.

Unity gain mode

B.

Open-loop (no feedback)

C.

Closed-loop with negative feedback

D.

Active region

35 $In a comparator circuit, if the voltage at the non-inverting input () is greater than the voltage at the inverting input (), the output goes to:$

A.

Positive Saturation ()

B.

Negative Saturation ()

C.

D.

36 $Which application is a primary use of an op-amp comparator in Anti-lock Braking Systems (ABS)?$

A.

Differentiation of the steering angle

B.

Integrating the brake pressure

C.

Amplifying the audio signal for the driver

D.

Converting wheel speed sensor signals to digital pulses

37 $In an ABS system, the comparator typically compares the wheel speed sensor signal against:$

A.

A fixed reference voltage (e.g., Ground)

B.

The battery voltage

C.

The output of the alternator

D.

The engine temperature

38 $Why is negative feedback generally NOT used in a simple comparator circuit?$

A.

It creates instability

B.

It is used; this statement is false

C.

It slows down the switching speed

D.

It reduces the gain too much

39 $What happens if a differentiator input is a sine wave: ?$

A.

B.

C.

D.

is zero

40 $In a practical integrator, a resistor is often placed in parallel with the feedback capacitor to:$

A.

Convert it to a differentiator

B.

Reduce the gain at low frequencies (prevent saturation due to offsets)

C.

Increase the slew rate

D.

Increase the bandwidth

41 $Bandwidth of an ideal op-amp is:$

A.

Infinite

B.

C.

D.

Finite

42 $What is the slope of the frequency response roll-off for a first-order Low-pass RC filter?$

A.

B.

C.

D.

43 $Which component determines the 'order' of a passive filter?$

A.

The resistor value

B.

The number of reactive components (Capacitors/Inductors)

C.

The voltage source

D.

The load resistance

44 $An op-amp usually requires which type of power supply?$

A.

Current source only

B.

Single AC source

C.

Dual polarity DC supply (and)

D.

High voltage AC

45 $In an inverting amplifier, if the input signal is peak-to-peak sine wave and gain is -2, the output is:$

A.

peak-to-peak sine wave

B.

peak-to-peak sine wave, in phase

C.

peak-to-peak sine wave, phase shifted

D.

peak-to-peak sine wave

46 $Which of the following is NOT a property of an ideal Op-Amp?$

A.

Infinite Output Impedance

B.

Infinite Input Impedance

C.

Infinite Bandwidth

D.

Infinite Open Loop Gain

47 $In an ABS system, if a wheel locks up (stops rotating), the frequency of the pulses from the wheel speed sensor (processed by the comparator) will:$

A.

Drop to zero

B.

Increase to infinity

C.

Remain constant

D.

Invert polarity

48 $A Band-pass filter is effectively a cascade combination of:$

A.

Two Low-pass filters

B.

An integrator and a differentiator

C.

A High-pass filter and a Low-pass filter (with overlapping passbands)

D.

Two High-pass filters

49 $In a non-inverting amplifier, the input signal is applied to:$

A.

The non-inverting terminal (-)

B.

The inverting terminal (-)

C.

The feedback resistor

D.

The output terminal

50 $The voltage at the non-inverting input of an inverting amplifier (connected to ground) is:$

A.

B.

C.

D.

Unit 5 - Practice Quiz