BEE Bachelor of Electrical Engineering Analog and Digital Electronics Questions and Answers

Question 1

An ideal operational amplifier (op-amp) is configured as a non-inverting amplifier. Which of the following characteristics is NOT representative of this ideal model?

Accepted Answer

Zero common-mode rejection ratio (CMRR)

Answer

Zero output impedance

Answer

Infinite input impedance

Answer

Infinite open-loop voltage gain

Question 2

A digital designer needs to simplify the Boolean expression Y = (A + B)'. According to De Morgan's theorems, which of the following expressions is equivalent?

Accepted Answer

Y = A' . B'

Answer

Y = A' + B'

Answer

Y = (A . B)'

Answer

Y = A . B

Question 3

In a BJT common-emitter amplifier configuration, what is the typical phase relationship between the input signal at the base and the output signal at the collector?

Accepted Answer

The output is 180 degrees out of phase with the input.

Answer

The output is in phase with the input.

Answer

The output leads the input by 90 degrees.

Answer

The output lags the input by 90 degrees.

Question 4

A technician is troubleshooting a Class B push-pull amplifier and observes distortion on the output waveform precisely at the zero-crossing point. What is the most likely cause of this issue?

Accepted Answer

Crossover distortion

Answer

Thermal runaway

Answer

Clipping distortion

Answer

Harmonic distortion

Question 5

Which type of Analog-to-Digital Converter (ADC) operates by sequentially testing each bit from the most significant bit (MSB) to the least significant bit (LSB) to find the digital equivalent of an analog signal?

Accepted Answer

Successive-Approximation ADC

Answer

Flash ADC

Answer

Dual-Slope ADC

Answer

Delta-Sigma ADC

Question 6

A JK flip-flop is configured with both J and K inputs held high (connected to logic 1). If a clock signal is applied, what will be the behavior of the Q output?

Accepted Answer

The output will toggle its state on each clock pulse.

Answer

The output will be permanently set to 1.

Answer

The output will be permanently reset to 0.

Answer

The output state will be indeterminate.

An ideal operational amplifier (op-amp) is configured as a non-inverting amplifier.Which of the following characteristics is NOT representative of this ideal model?

An ideal operational amplifier (op-amp) is configured as a non-inverting amplifier.
Which of the following characteristics is NOT representative of this ideal model?