Electronics (ECE) - MCQ Practice Questions

What is the main advantage of using CMOS technology over NMOS in digital circuits?

Which of the following is the correct Boolean expression for De Morgan's Law?

What is the propagation delay in a ripple counter compared to a synchronous counter?

In a 4:2 encoder, if input line 5 is active, what is the output?

What is the primary purpose of a Schmitt trigger in digital electronics?

In combinational logic design, what is the sum-of-products (SOP) form?

What does the term 'fanout' mean in digital logic circuits?

Which type of latch is transparent when the control signal is HIGH?

What is the output frequency of a 4-bit ripple counter when driven by a 16 MHz clock?

Which of the following statements about asynchronous reset is TRUE?

In a 4-bit synchronous binary counter using JK flip-flops, if the clock frequency is 10 MHz, what is the maximum counting frequency at the MSB output?

The bandwidth of a common emitter amplifier can be increased by

In a differential amplifier, the common mode rejection ratio (CMRR) is defined as

The input impedance of a voltage follower (common collector) amplifier is

At what frequency does the gain of a RC coupled amplifier reduce to 70.7% of its mid-band gain?

In an RC coupled amplifier, the lower cutoff frequency is primarily determined by

For a feedback amplifier with feedback fraction β, the loop gain is defined as

In a Class A amplifier, the maximum theoretical efficiency is

In a Colpitts oscillator, the frequency of oscillation is determined by

The gain-bandwidth product (GBP) of an op-amp is approximately constant. For a 741 op-amp with GBP ≈ 1 MHz, the open-loop gain at 100 kHz is approximately